Gravatar (Globally Recognized Avatars) has been acquired by Automattic. Changes to Gravatar over the past few days :

Automattic transferred the Rails application and most of the avatar serving to WordPress.com infrastructure and servers.
Avatar serving is now more than three times as fast, and works every time.
All the Premium Services like Multiple email id’s and avatars [...]

Jaiku, the social micro blogging service, has been acquired by Google.
Not much information on the takeover has been published yet. Jaiku has been a popular service amongst the mobile community, though it has a smaller user base of online users.
The registration has been temporarily frozen and users can request for an invitation.

BBC Worldwide, the international arm of BBC, has acquired Lonely Planet, the Australia-based travel information group. Although the amount of the deal was not disclosed, Lonely Planet founders Tony and Maureen Wheeler get to keep a 25% share in the company.
Lonely Planet has been creating travel guides and programming for channels like Discovery.
[ Via Mashable [...]