Just taking a quick look at version 1.6 beta in more detail and I have a few questions/issues.
Are you planning to redesign the user answers list? (I think I mentioned this here somewhere or maybe via PM.) I don't like that it shows questions on the answer list, instead of answers. It's confusing to say "+10 votes" when your answer actually has +2 votes for example. All we need is one box for the answer votes, then the question title and date the answer was posted (and perhaps a snippet of the answer like my user activity plugin).
A second issue is that the answers page doesn't show all answers if I have multiple answers per question. It only shows each question once.
I like the plugin page improvements but I feel it would be better if when the form comes up, it is more clearly separated from the surrounding plugins e.g. with a background. Or a horizontal line bewteen all plugins, like the questions list. Or since you are doing a whole new page load, why not just move the form to a page on its own?
On a similar note I spotted a bug - the class name given to the form when it appears is not correct, it has spaces in e.g. <div class="qa-part-form-editor-WYSIWYG Editor"> - I guess it's meant to be a number like the other divs are (qa-part-form-plugin-18).
If you post too many wall messages, you get a big red error saying that (which is fine). But firstly it is at the bottom of the list instead of the top where you would expect it (since new messages are posted at the top).
And secondly, the message stays on the page when you reload or go to any user page. Once you've seen the message it's weird to have the site telling you that all the time. Maybe on later page loads just make it regular text.
Third issue - you can only see the latest 10 wall posts. If you post another one the bottom one disappears and I can't see any way to get it back. Is there going to be some pagination there, or maybe a new full page with all wall posts?
Apart from that it's looking good so far! I've not had a chance to look at the image upload thing yet, will test it some time this week.