We don't know exactly what's going on, but both Xbox Live and Zune Marketplace are apparently acting up right now -- we've gotten reports that the entire Zune user database is more or less MIA, while Xbox Live seems unable to process purchases reliably. If we had to guess, we'd say that Microsoft's free Thriller video giveaway is causing some pretty massive server strain, but that's just a shot in the dark. Keep us posted on how you're doing, and we'll let you know if we hear anything official.

[Thanks to everyone who sent this in]