I've only been in town for a week and have only casually looked for the .Net Community ... I seems to be mostly centered in Redmond (with good reason) with only a few things going on in the downtown area.  Reminds me of when Sam started the Beantown .Net user group - the .Net Community in Boston was centered in Waltham ... so I'm wondering if there is enough demand to start a downtown Seattle .Net user group ???

I found this MSDN event today from Jason Mauer's blog

I know Anita Rowland organizes regular meetups around Seattle, in which I hope to make next month's to see what it is like out here.

I'm still browsing for things going on around Seattle (before I actually start going to anything) ... I'll keep you posted - and if you know of anything, please let me know!