Here are some avatars.
None of them have transparent backgrounds, you'll either have to do that yourself or find a nice person to do it for you.
Mr. Shine|Commander Vimes|Tau|
A Gobwin Legionary|Samurai Belkar|
The Bursar| Wraithguard
Rincewind|Elan and Haley|Gender bender Elan
Gender bender Durkon|Gender bender Belkar[/table]