I was thinking about looking into setting up twitter for notifying people of audiogames.net news, but until i know a little more about this I'll hold off for now (especially since I also would need a twitter client as I suspect the default windows one is probably rather bare bones).
one problem I always have with any uploading of picture issue, is that most are either by drag&drop, or by a more complex custom picture uploading method that requires resizing and mucking around with the actual immage not just the file to work, you can't just grab the file using file explorer and C&p it to somewhere.
This is why when I was playing core exiles and uploaded a picture of Reever I actually had to use sendspace to send the file since I couldn't get their image upload system to work.
if twitter will allow a basic copy & paste of a file then this won't be an access problem since all screen readers will
handle a copy and paste operation no problem, if however it takes actual image handling, drag and drop or a custom upload and trim method then it may well be problematic.
I have a nasty suspicion it won't be a basic copy and paste, simply because it would be pretty easy to create a spambot that does the same thing, heck even if it isn't a copy and job, the usual drag and drop resize image handling is very easy for sighted users I doubt it'll stop much anyway.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)