1) you do have info that shows up under your name. number of posts, your location, thanked xx times.... etc.

2) go to
http://talk.maemo.org/profile.php?do=editsignature

3) go to
http://talk.maemo.org/profile.php?do=editavatar

4) write the word you want to appear as a link. then select it and click on the symbol with the blue globe above the text input area. a window will pop up asking for the URL. then this will be automatically transformed into the correct forum-style code for URLs.

5) yes, its a download.