Sorry I spoke too soon Sam, I was referring to the featured image. I too would like the attachment images to show up as a large size (in my wp settings) photo. Off for Turkey Day but if I figure something out soon I will post it. Please do the same.
I just used this great plugin on a site and edited the theme to get them to display the way I wanted them to. Here’s the code you’ll need in the WordPress codex.
http://codex.wordpress.org/Post_Thumbnails
I tried to install wordtwit for someone a few weeks ago and ran into the same problem. From the information I read while trying to find a solution, it appeared that their website’s IP# had been blocked by twitter as spam. Even if you never did anything to be banned, many of the lower rate hosting packages put numerous sites on the same IP#.
