I put Satrina Buff Frames v3.1 up to release status today. It brings the single most requested feature I've had since releasing 3.0: the ability to use filters for any unit's buffs.
There are lots and lots of other goodies in SBF 3.1! Download it - but not 5 minutes before a raid! - and play around with it, see what it can do now. Make sure to visit the SBF site
for help and hints on using SBF.
If you are upgrading from SBF 3.0, do take a moment to read the SBF 3.0 to 3.1 Survival Guide
. It outlines the biggest changes between 3.0 and 3.1 for you, and will help you get your new SBF up and running in no time.