Any advice on customising this twitter feed?

It’s part of the Webzine theme – if you take a look at the source, near the bottom, there’s a rather hefty chunk of JS that queries Twitter & renders the tweets.

Now whether that code is sat there waiting for you in footer.php, or called in from somewhere else, I don’t know – if the latter, you’ll have to root around the theme folder to find it!

It’s worth mentioning that the Twitter user status API is loaded again (along with Twitter’s own blogger.js for the callback) at the very bottom of your site, but it’s not actually utilised – you could save yourself some processing (& headaches for that matter) by removing it.