Thanks for the feedback and good wishes snikolic.

I was in a similar situation to your customers - I would rent an L4D2 server for a few months, then let it expire if I was spending "too much" time on a new game. This was the initial inspiration for Cloudfrag.

It sounds like you might have some interesting ideas and experiences in this area - if you would like to share, my email is in my profile.

Thanks again!