This one almost flew under the radar.
Posted (quietly) today on Bump’s blog:
We’re excited to announce that the Bump team is joining Google!
Our mission at Bump has always been to build the simplest tools for sharing the information you care about with other people and devices.  We strive to create experiences that feel like magic, enabled behind the scene with innovations in math, data processing, and algorithms.  So we couldn’t be more thrilled to join Google, a company that shares our belief that the application of computing to difficult problems can fundamentally change the way that we interact with one another and the world.
As of right now, no changes are planned in how Bump works, and the same team will still be working on the app, just under the Google umbrella. Hopefully this will mean some cross-pollination of sharing services, as Google’s built in ANdroid offerings, even for NFC, are pretty lame.
No word yet on how much Goog spent on acquiring this popular service.