I could be wrong on this, but I'm under the impression that the direct image links for Twitpic images are completely useless. Should we be encouraging uploaders to replace it with the indirect page link immediately after uploading? The link alone is still not helpful for the "Find artist" feature but at least it's easy to go and identify the artist's Twitter/Twitpic handle from the page. Also, there is some variation as to which page is used for the source:
I think I prefer using the "full" link, so the full version is in view immediately upon checking the source. The only downsides is it takes one extra click to get back to the artist's photo page and makes no difference on smaller images.
Speaking of the artist's photo page (like so: http://twitpic.com/photos/****** ), I recommend uploaders add that link somewhere in the artist's wiki immediately after uploading or tagging an image known to be from Twitpic, for ease of access (particularly in case images currently sourced get removed at some point but the artist's Twitpic account remains).
Updated by jxh2154