Sometimes I look something like this:
I grew up in the UK, but moved to New Zealand in 2008, and now live not far from Wellington.
I have a blog, which is mostly about Xapian currently.
You can find slides, videos and/or audio for some of the talks I've given on my talks page.
In the UK, I mostly used to cave with Red Rose CPC ULSA and CUCC. In New Zealand, I'm a member of the Wellington Caving Group.
I've written Survex - a software package to help those surveying and make maps of caves. It was originally written for CUCC's Austria explorations, but is now used by many other cave surveying projects around the world.