The news this week, aside from "what the hell is going on in the middle of the defense" (more on that tomorrow), is that WR Ben Obomanu has been placed on injured reserve after breaking his wrist in Detroit. To replace him, WR Jermaine Kearse has been activated off the practice squad.
Kearse has some intriguing physical ability (he can play a little running back, too), but I doubt he'll be seeing much time on offense. Obomanu was a special teamer first and a backup wideout second, and that shouldn't change now that Kearse has taken over his job.
With Doug Baldwin (limited participation in practice) and Braylon Edwards (no participation) both still very questionable to play, don't be surprised if the Seahawks add another wide receiver in the near future. Since we've reached the midway point of the season, I'd expect them to bring in someone who is already familiar with Bevell's offense. Lavasier Tuinei and Phil Bates are both currently on the practice squad, so they would be possibilities, but there are also plenty of free agents who fit the bill like Deon Butler, Ricardo Lockette, Mike Williams, Terrell Owens, and Bernard Berrian. And if those aren't enough names to pore over, here's a list of some of the other players who are still on the market.