We hold small social gatherings at local pubs and cafes around twice a month. Details are mainly posted on the mailing list and IRC; the website is sometimes a little out of date.
We sometimes hold talks on various Linux, computing and technology topics. If you'd like to organise or give a talk, get in touch, we'd love to hear from you.
Our main gathering each year is the InstallFest, two days of installation, configuration and general conviviality where we aim to get as many people as happy as possible with their computer systems. It's a great way to meet interesting people and eat interesting cake, too. See the InstallFest 2010 Report for an idea of what we do.