TTSCOFF  NetNewsWire is supported for grabbing URLs, if that's what you mean. Proteus' AppleScript implementation doesn't currently allow us to support it, but we're watching for it.

TwitPic and image uploading in other services is in the plans.  
(Version 3.2)

TTSCOFF  I'm working on a new set of docs and an accompanying screencast to help shed some light on the mysteries of moodblast. Admittedly, it gets a little complex if you want to do anything fancy with it.

Of special note is the Facebook string =[x|y]. Using that syntax, anything you put in for x goes to Facebook only, y goes to everything else. This can be used multiple times in a string. Pressing the test button will concatenate your string and show you your final results before sending, preserving any special status or override states. Use the test panel!

Example: =[working like crazy on|I'm slaving away over] some new docs for MoodBlast 3.0.  
(Version 3.0.1)