My most recent venture started out as a side project and is now becoming my main focus. It is a simple Twitter App which makes it easy to share more on Twitter whilst annoying your followers less (by helping you to avoid tweeting 5 links in a row within minutes).

It took 7 weeks for me to take it from idea to launching the MVP (during most of the build period I had people using the service).

I had my first paying customer 4 days after launch. It has now been running for just under 4 months and I am making $315/mo, though that number is rising almost every day (it is a freemium service with a free plan and paid plans priced $5/mo and $30/mo).

I am likely to reach ramen profitability within a few months and will focus fully on it.

I blogged about how I took it from idea to first paying customer, which may be of interest - http://blog.bufferapp.com/post/3328167762/idea-to-paying-cus...