A couple of weeks ago I switched my primary workstation over to Ubuntu as the next step in my transition towards an Open Operating Environment (first it was IE=>Firefox, MSOffice=>OpenOoffice, now WinXP=>Ubuntu). So far I absolutely love Ubuntu. It is the first desktop Linux that has actually been easy to use... so much, in fact, that I went ahead and installed it on my wife's laptop also. She's not a geek and has very little patience for technology that doesn't work, and even she thinks it is great.
So far I've installed Eclipse, Rational Application Developer, Apache2, WebSphere Application Server and DB2 8.2.. all of which run great. The DB2 install was a bit of a hassle due to DB2's use of rpm's for install, but thanks to fellow IBMer Dan Scott I've got it up and running.
The next task is getting Lotus Notes to run. Being a Windows app, Notes requires Wine to run. Unfortunately, it doesn't seem to want to work with the current versions of Wine. I'll get it figured out eventually, but in the meantime I'm running a fetchmail-based script written by a colleague that allows me to read my Notes email from within Mozilla Thunderbird. If I get Notes working, I'll let y'all know how I did it :-)