I've been a part of the LinkedIn network for a while now but with Neil recently starting a .NET Compact Framework Group on Facebook (and a Skype Chat dedicated to .NET CF and MicroFramework) I decided to join Facebook also.
Overall impression of Facebook is it's pretty cool. More of a personal feeling instead of all business which is what LinkedIn is. My only grip is I have to go to facebook.com to see what is happening as it only sends a few notifications and there is just not enough time in the day for that :( Since I'm a developer I've been looking at the APIs and seeing how that could be used in a Windows Mobile application since they are all web services*.
If you are on Facebook and want to add me as a friend here is my profile:

If you are on LinkedIn and want to add me there, here is my profile:

*As I was typing this I noticed Peter has already done some work on the Facebook Toolkit on codeplex using .NETCF 2.0