Today Microsoft released SCCM 2007 R3! Instead of going into a long blog post about all the exciting new features R3 has, I'd like to refer to an EXCELLENT run down of all the features by a co-worker of mine, Steve Rachui. If you run SCCM, R3 is definitely a worthwhile update that's painless to implement into your existing environment.
Check out Steve's post here.
Download the evaluation copy here.
Read the official announcement here.