Digital Briefs: T-Mobile, The Grammys, Guitar Hero, Apple

- T-Mobile USA is teaming up with The Recording Academy again this year to help promote the Grammys. The deal includes a contest to bring Sidekick owners to the event as well as T-Mobile's sponsoring of Clive Davis's pre-event Gala.

- As expected, Activision's "Guitar Hero: World Tour" outsold rival "Rock Band 2" from MTV by a ratio of almost 2-to-1, according to market research data from the NPD Group.

- Former IBM exec Mark Papermaster will join Apple to lead its devices engineering team, now that Apple and IBM resolved their legal dispute over his hiring.

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