When it's not raining cats and dogs, or frogs, it's RainingBuckets.com [1], who helpfully storm proofed some windows in rainy Seattle to get their message and URL out there. The storm is coming; the 2006 WNBA season is starting (and as I type this thunder just rumbled outside and I'm not kidding. Spooky!)
Sedgwick Rd. are the minds behind the campaign of which this window is just the beginning....

Links:
[1] http://RainingBuckets.com
[2] http://technorati.com/tag/Ambient & Guerrilla