I live in Bristol but work out of Chippenham; I've been working with ExtJS on and off for the last couple of years, but the beginning of this year we selected ExtJS as one of our key technologies. There's a couple of JS guys in the team that would be happy to meet up and chat, maybe over a beer? Bath's a lovely place we'd be happy to come over that way
I too have been using Ext JS (and Ext.NET) for a few years, as well as dabbling with Sencha Touch more recently.
I'll hopefully be setting up an "Ext JS / Ext.NET" Meetup.com group for the Bath/Bristol area in the next few days, so once we have more interest we can hopefully arrange a meetup.