Hi there,
if you use TwitPic to post photos to Twitter you probably would like to show a thumbnail in your Action Stream. Here is how I did it.
First you need the good old Regex Plugin from Brad Choate (http://www.bradchoate.com/weblog/2002/07/27/mtregex). Then you need to define a regular expression like this:
s!(.*)(http://twitpic.com[^\s!g
Later you can treat Tweets that contain the word 'twitpic' like this
And you will get a nice thumbnail with a link to the proper TwitPic page.
PS I don't know if the regular expression is elegant. It works, but maybe someone can tweak it a little bit.
Regards, Yves
Reported on Movable Type 4.2

Argh, half of the code has vanished. An edit function would be cool to fix the posting. Here we go again:
The regular expression:
Usage of the regular expression:
Sorry, for the trouble.