Michigan did as well! (ok not total decriminalization, but it's the first step!) Not surprisingly this passed by a landslide in Washtenaw county (home of Ann Arbor, which has championed cannabis decriminalization for years!)
Yea 3,008,980
Nay 1,792,870
Yee-ha!
Time to start planning the 2009 ballot proposals... (and getting the signatures)