I installed Beryl onto Ubunto 2.10 tonight expecting something resembling OSX's fancy effects. I realise Beryl is in it's early stages but I thought my trusty PC could handle it. Wrong! The performance hit was immense - scrolling a web page felt like my CPU had suddenly been replaced with an 8086 with 512k of memory. The effects are over the top (understandably so until things settle into a usable state), but I think I lasted about 3 minutes before I disabled it and returned to Metacity. Shame. Maybe I'll check back in 2 years.