I may pick one up. Supposedly it's supposed to be compatible with a number of third-party games, including RE: Umbrella Chronicles, and I'll be playing that I was evening considering the Wii Sports add-on pack that Gamestop sells for like $10 to make your Wii-mote look like a golf club, baseball bat, and tennis racket.
Check it out: http://kotaku.com/gaming/breaking/nintendo-dates-wii-zapper-confirms-links-crossbow-298328.php