I don't know what XMPP server we are using. I was not the one that set that up. I only have access to all of the FreeBSD/Linux machines in the company, someone else gets the pleasure (or should I say displeasure) of managing all of the Windows server infrastructure (AD, File servers, stuff like that), including where our XMPP service is being run because it requires AD access. Upsides and downsides to being the only developer in the company that knows Unix...

We have a gitorious server that also has a jenkins account (jenkins connects over SSH). It is running within a VMWare Virtual Machine with access to 4 cores running at 2.4 Ghz, and 14 GB's of ram. Whenever jenkins notices a change in git (using polling, every 5 minutes, set up for now, eventually I'll get around to doing push notifications of some sort ...) it pulls down the latest source code, and starts up the Google Android emulator (basically qemu for the ARM platform with the devices as an Android phone would have them), once that is started up it compiles the source code (java) and using adb installs it on the phone, runs the test suite, and reports any errors back, Jenkins then shuts down the emulator.

It isn't extremely fast, starting up the emulator takes about 50 seconds or so, and I am trying to get a faster server to use as a jenkins build slave, but for now it works wonderfully. Everything I mentioned is completely managed by jenkins.