Just installed it last week. 11.04 x64 on a Agility 3 SSD, with 12 Gigs RAM and an i5 2500k processer. Its bliteringly fast. Much faster than my Windows 7 install on the same drive.
Boots from bios to log in screen in about 12 seconds! Firefox is open 1 second later.
Who knew the powers of SSDs huh?