I've been running Windows 7 for several weeks now and I love it. However there has been an adjustment period as several features and functions have been changed.
One thing I rely on quite a bit is moving windows by right clicking on them in the task bar. The "Move Window" option no longer shows up in Windows 7.
However you can get the old style context menu by holding down shift while right clicking on the task bar.
If you use multiple monitors and/or remote desktop you'll likely find this useful.