Mister Wong, a social bookmarking start-up based in Germany, has acquired Lifestream.fm, a service that lets users aggregate their web activity from various social networking services. The news was confirmed by News.com, following up on a previous report from Mashable. The move puts Mister Wong in a larval space, where the recently launched FriendFeed (subject of a glowing NYT profile this weekend) has commanded the lion’s share of attention. Lifestream founder Juan Xavier Larrea had previously sold two other sites, Websnapr and Pixer.us, to Mister Wong, according to the report. Deal terms were not reported.