I have to agree with Martin's comments below, especially when I'm trying hard not to inadvertantly stand on his Martin guitar. So as you can see, recording double bass is a dangerous business.

For those tech-heads that are interested, we record it with an AKG-C4000B just in front of the bridge and the left sound hole into a Mackie Onyx mixer with firewire card direct into Cubase. This is the setup we use to record vocals and acoustic guitar and pretty much anything that makes a sound that we need to capture.