[hglaser]

(Full disclosure, co-founder of Periscope Data here.)

Periscope Data supports cross-DB joins. We cache the data in our own clusters so queries run really fast, and also so you can do things like join across databases and upload CSVs.

More info: http://www.periscopedata.com. I'm harry at periscopedata.com

[jtmarmon]

woah, right as a I wrote that edit I get this comment ;) very cool. checking it out