Oh it looks like I just missed 2015's. Hopefully next year. Microconf sounds interesting.
The conference is made by Rob & Mike from the essential bootstrap a business on the side podcast "Startup for the rest of us".
There might be a few tickets left for Barcelona - I'm attending (and my saas startup http://timeblock.com is sponsering !)
Hope to see you in either!
I was interested until I saw the price, frugal bootstrappers must not be the target audience.