So, probably like lots of people – i run a few web apps locally that I use for various purposes. In my case, this also includes some cool custom developed things.
I also use Zeroconf to easily discover all this foo around a network.
I run my critical mysql install by hand – it’s not constantly up. This is so, as somebody noticed (during Eben’s keynote at the MySQL Conference where he talked a lot about privacy) that one of the apps i run is entitled “tax”.
Since I’m somewhere other than at home, my mysql instance was stopped (much harder for people to grab the data out of it if the process isn’t running to begin with).
So yeah… good points – check what random people out on the network may have access to on your laptop – and know what you should not run as default (I’m careful there).