As I noticed on Gamedev.net Design3 made a series of tutorials for Blender 2.5x UI navigation available. Considering that the user interface may perhaps be Blender’s most difficult aspect for new users, these can be incredibly handy.
However, Design3 have made available all off their tutorials available for free until July 10th. Considering they cover Blender and Unity development, this should be of interest to all of you, so check it out. You do have to sign up for a free account to access many of the tutorials however.
Big gotcha, their site SUCKS with Internet Explorer 9! Badly. Point blank, the registration process will not complete if you are using IE9. It worked flawlessly in Chrome however.