According to the post the extent of Google discovering erlang is erlang style concurrency in Google Gears. To me erlang the language and erlang style concurrency are two very different things.
* Amazon SimpleDB on Erlang (friend of a developer): http://www.satine.org/archives/2007/12/13/amazon-simpledb/
* IMDb on Java/Erlang (a job posting): http://www.computerjobs.com/job_display.aspx?jobid=2052172
* Gears on Erlang: N/A