Full time since January. Still in dev phase and a while before going live. and it's not a pretty sight to see your savings declining steadily (we are bootstrapped on top of this). Yup, I am all in as much as I can go.
note: There is a poll option that might better suite this topic (instead of 4 comments being voted up and down).
I (Mohit Soni) and my 2 friends (Shashank Shekhar and Kalyan Chakravarthy) are working on Flare (A True WebOS). We were finalists in Google Product Prodigy 2009. Very soon we'll be launching Flare as a service.
How is it working for you? Mine it is my own startup. My cofounder still has his day job. Our progress is way too slow. I'm considering to save as much money and go full time soon.