I had been running Ubuntu 10.10 Netbook remix and had not been enjoying it as much as 10.04. The Unity interface was slow and not great to work with. I was looking at MeeGo, other Linux version, and stumbled over Jolicloud. I wasn't keen on cloud based computing (call me old fashioned), but it really impressed me. It runs faster than Ubuntu (even though underneath Jolicloud runs on Ubuntu). It is fast, smooth, and was trouble free to setup. I have a Mini 1012 as my main Win7 netbook, so living in the cloud hasn't been the pain I was expecting. I just keep my files synced with the nice Dropbox client and my data is where I need it! It even gave me better battery life.
If you are looking to try a different OS, give Jolicloud 1.1 a try. The liveCD makes it easy to play with.