Category backgrounds - if you are using 6.1 check out the 6.1 beta hacks for Category BG hack, if ur using 6.xx check out those forums for gradient hack
Who's Online Column - I could tell you, but i doubt the author of the site would like that, maybe find who it is and PM them or ask on their board
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.