My second company (Sense/Net) ran it's second ever event this year, 44Café. It was a one day event alongside the UK's biggest infosec exhibition. We didn't make any money from it (in fact it cost us about $5,000 all in) but we did the event to raise awareness of the main conference[1] we're organising for September, which I hope will bring a return in (although the olympics are doing their best to make anything in London ludicrously expensive).

I'm also working on something for our first external event (i.e. an event organised on behalf of someone else), which will be really cool if it goes ahead.

[1] - http://www.44con.com/