—Sparkplay Media: Current Media and AOL vet Stephen Blumenfeld joined browser-based game developer Sparkplay Media as CTO. Blumenfeld had most recently been serving as a new media and tech consultant; prior to consulting, he spent three years as CTO of Al Gore-backed Current Media. Before Current, he'd served as VP of technology at AOL. Founded in 2006, Sparkplay plans to launch Earth Eternal, a massively multiplayer online (MMO) game, later this year (via TechCrunch).

—interCLICK: Former Yahoo executive Dave Myers has joined the ad network as its new VP of ad operations; he'll oversee everything from media buying and account management, to analytics and ad operations. Myers most recently served as Yahoo's senior director of advertiser marketplace operations; prior to that, he worked at Microsoft (NSDQ: MSFT), as enterprise services engagement manager. Release.

—Linden Lab: VP of corporate development Ginsu Yoon is leaving. Yoon's resignation comes about two weeks after the departure of CFO John Zdanowski; both execs joined the Second Life developer in its infancy. Like Zdanowski, Yoon said he was hungry for a "startup" environment again (via the Second Life blog).

Joseph Tartakoff contributed to this post.