The name isn’t the only similarity between the two recent purchases. Like Zingku, Jaiku is designed to appeal to mobile users. As Jaiku states in the acquisition FAQ:
Jaiku is an activity stream and presence sharing service that works from the Web and mobile phones. Jaiku, Ltd. was founded in February, 2006 by Jyri Engeström and Petteri Koponen from Finland. The service was released on the Web in July 2006. Jaiku is based in Helsinki.
Oh. It’s like Twitter, then? Your Jaiku activity stream can include text messages, photos, events, recommendation, etc. So perhaps it’s Facebook+Twitter? (In case you’re wondering, Jyri is pronounced a little like “Yuri,” with the ‘r’ rolled. Except we don’t have the Finnish vowel ‘y’ in English. Well, rather than launch into a Finnish linguistics lesson, let’s focus, shall we?)