After running Fedora Core 3 on my home server for the last 2 years, I think I'm going to finally put it down and try out Core 6. The built-in AIGLX/compiz work looks promising. Running it on an integrated Intel graphics chip(82845G/GL) will be a good test. (Not that fancy desktop effects are really needed on this machine.)
I'm more interested in Fedora's wireless compatibility. I've got a cheap TEW-423PI working fine on an unsecured AP with Core 3, but I need WPA, and wpa_supplicant is giving me fits. I think it's more likely the TEW-423PI(or maybe just the Windows driver running under ndiswrapper) is a POS, and not a Fedora issue at all. But maybe I'll get lucky with Core 6.