Glad to hear that the IRC log was useful. We’d be more than happy for you to join in the meetups at any time.

And although it became obvious (a few seconds later) that one should click on the headings of e.g. http://translate.wordpress.org/projects/wp/dev to sort the data, perhaps it may be helpful to have arrows as a visual guide?

Thanks

Markup
In general, the HTML markup is solid with good use made of list tags. Where it does breakdown is when you get into individual project translation tables (example table). As these are fairly complex data tables, I feel that it’s essential to ensure that best use is made of id for table headings and the headers attribute for individual cells. This should allow assistive technology software to render the tables in a far more meaningful manner as well as allowing disabled users to move around the tables far more effectively. Two excellent resources on this subject are Making Tables More Accessible With HTML5 and Accessible Data Tables.

Contrasts
On pages like Projects → WordPress, the contrast for the (definition) description of each sub-project is far too low at only 3.5:1. Even I’m straining to read it. It needs to be increased to at least 4.5:1 (try #777).

Readability
Generally speaking, I’d like to see an increase in the text sizes. A body font size of only 14px is a little on the small side. In some areas — such as the descriptions for each sub-project on the individual project pages — the text really is becoming hard to read without using Zoom.

User Support
When you first hit the site’s front page, there is an overwhelming feeling of “Where am I? What’s this all about?”. The site really doesn’t explain it’s purpose upfront, so it’s easy to imagine many users being somewhat bewildered and unsure of where to go next. Some of the initial content from Getting Started with translate.wordpress.org could really be moved from that page and placed at the top of the site’s front page to clearly establish the site’s purpose.

Navigation
This site really doesn’t have an effective navigation system. Instead, a breadcrumb is used in place of a more standard navigation menu. Whilst this is functional, it does force users to navigate to and from the site’s front page all of the time — which could impose an unnecessary burden on some keyboard navigators. I also noted that there is no way to skip this breadcrumb/navigation menu when entering a new page. Yet another issue for keyboard navigators.

Some disabled users also rely on the title tag (as displayed in the browser tab) for primary navigation. Once you drill down into sub-sub-projects, this tag uses text like “3.5.x < GlotPress" — which isn't exactly informative. 3.5.x of what? In other areas, the title is far more helpful — "Translations < Dutch < Twenty Twelve < GlotPress". At the risk of increasing redundancy, perhaps a solution to this would be to re-address the headings on (for example) the WordPress project page, so that they used a “WordPress 3.5.x” format? This should create page title along the lines of “WordPress 3.5.x < GlotPress".

And Finally…
There's the issue of the site's name — GlotPress. A name also shared by an official wordpress.org blog and the open source content management application being used to generate content on translate.wordpress.org. I’ve left this until last because I feel that this definitely overlaps into usability but could still impact heavily on some disabled users groups. If I link to GlotPress, which of the three resources am I linking to? If you cannot tell without clicking the link, then we have a problem. I’d like to see each of these resources use their own unique names. Perhaps translate.wordpress.org (currently the only way I can clearly reference a specific resource) could be renamed “WordPress Translate”?

the homepage, Projects for the Getting Started Guide as the heading, including link to the guide….then maybe space above and/ or below the links.
summary for each project and the Getting Started Guide can be inserted for educating the users about the products before clicking.
Add users guide /explanation link
Accessibility:
Every link needs at least a description “Project: ____ is not enough description if I do not know what project____ is, possibly, add a guide about the layout explaining that the left column is a list of sub-projects and the right column is the list of translations.

For the homepage, I recommend a section similar to Projects for the Getting Started Guide as the heading, including link to the guide. For the link list, I also recommend space above and/ or below the links.

Maybe, a brief introduction or summary for each project and the Getting Started Guide can be inserted for educating the users about the products before clicking.

Also, there isn’t a search tool or a privacy policy link/document on homepage.

Accessibility:

Every link needs at least a description, or more information about what it is. For example, alternate text, “Project: bbPress” is not enough description if I do not know what bbPress is. How will I know to click on it?

When I click on bbPress or any other link, it opens to a dashboard-like page. Maybe, there should be a guide also about the layout explaining that the left column is a list of sub-projects and the right column is the list of translations in progress. Also, this guide can explain the attributes in the table.

Hope this helps,
Lauren