Images in category strips, different for each category.

[Princeton]

you would have to manually add that to the "forumhome_" nopost template (this would overide any embedded or external CSS)

you can then create your own gradients per forumid

gradient_tcat$foruminfo[forumid].gif
gradient_tcat34.gif
gradient_tcat5.gif

you would of course have to create a conditional if you only want the gradient to change only for a few places