I have a B, B+, 2, and now will have a 3. The B+ was deployed at a friends house to replicate my source control repository offsite. For some reason he unplugged it back in August and hasn't hooked it back up. Probably will get it back from him at some point.
Thinking about bringing one to work to keep handy as a personal "skunkworks" server to play with if I ever have time to experiment/learn LAMP stuff.
I spent some time on and off today tinkering with my Model B and 2. Got my svn repos syncing down to both. Also installed PHP and MySql on the model B. Going to tinker with a few things. Haven't done much in PHP. Would be neat to learn some basics.
I've been geeking out with my three existing PIs as of late. I have each of them configured with SVN to replicate my various repositories down as mirrors/backups. I also have them all configured to connect to my cloud server and create a reverse SSH tunnel through which I can gain access to them wherever they're deployed.... without having to configure a firewall and port forwarding.
For example, my original PI is sitting on my desk in the office connected to the public WiFi. I can SSH into it through my cloud server from home.
I've also been practicing some shell scripting. As you can imagine, the various things I'm doing work much better as scripts called by CRON that simply entered as commands into CRON.