I use x10hosting as a buffer of my pages in the auction.
On the page of auction I place links "delivery", "payment", "guarantee" that reside on x10hosting. It is very convenient. They are unified and I do not have to place them on the auction each time.
I use X10 for hosting my personal blog (nathanbent.co.cc check it out if you're bored haha) and for whatever project I feel like playing around with. I use wordpress, but I've tried almost every system for blogging, forums and galleries. That said, I normally don't push the envelope too much (other than when I set up wordpress caching wrong and unintentionally abuse the server :redface
I am using it to try out a little bit of website-making. I wanted to see how I would go with this before committing to paying for a service, so I am grateful to have the free service to play with for now.