Compared to Ubuntu 5.10, a lot of polish has been added. Since I came from a Fedora background, I was impressed to see that Ubuntu has caught up with all the polish that Fedora has (graphical installer, graphical boot, etc.). Furthermore, despite the fact that I installed it the day after it came out, the Wiki had already been updated with instructions on how to get deal with proprietary formats such as MP3s, Windows video, Flash, etc.
As far as hardware goes, everything pretty much just worked--even hibernate and suspend! To support the builtin wireless, I had to use NDIS. Here are my abbreviated instructions:
Add the ndiswrapper-utils package.All in all, I'm stoked. :)
Download the driver from ftp://ftp.us.dell.com/network/R102320.EXE.
ndiswrapper -i bcmwl5.inf
Reboot. I'm not sure if this is necessary.
Setup the network settings as usual.
If the card doesn't work, make sure you didn't hit some function key that turns off the wireless in the BIOS.