Dieter rates this rumor at 10%. He may be generous. Never-the-less, noted Silicon spysite Valley Wag is reporting that:
A source who's plugged into the Valley's deal scene and has been recruited by Apple for a senior position says Apple and Twitter are in serious negotiations, with the goal of unveiling a deal by June 8, when Apple's annual Worldwide Developers Conference launches in San Jose.
Valleywag thinks Apple may want to uber-cool web savvy of the Twitter crew for their own. Dieter had another idea: what if they're looking to spice up a BlackBerry Messenger (MMB)-style service to compete with RIM?