Election question: King County

I am filling out my first ballot since moving to King County (the voting is done entirely by mail here). I've sorted out choices for Bellevue City Council, and decided to skip the port commissioner and school board elections. That leaves King County Executive, which seems to actually matter. Having looked at their statements and poked around a little, I've eliminated Goodspaceguy [sic] and Alan Lobdell. The incumbent, Dow Constantine, looks plausible; is there anything I should know about him that hasn't turned up during my bit of googling? Also, any opinions on Everett A. Stewart beyond the obvious fact that he's not likely to win? (Googling him is trickier in part because most of the top hits are for an airport.)

I know this is a longshot, but it can't hurt to ask. I was able to find quite a bit on the 2009 King County Executive election; maybe we'll see more after the primary, but that doesn't help now. (This is an "open primary," meaning they don't list political parties and the top two candidates for each office will be on the November ballot.)