Hi Gary
Yes - we are still with them, and they are still great (the best of the cloud providers we have tried, very good support, well priced, and very stable with Aware).
BUT latency has proven to be an issue (most of our customers are in Aus), so we are planning on moving to Aus based provider (we use Zettagrid here), which has been good and bad. I think our inital set up with VMWare wasn't right, so it was unstable, but we have that fixed now and it is very fast. I think their support is slow and they are lacking some features that Storm provides (can't clone an instance) but the speed is very good.
We over provision our production servers, so we always deploy with 8GB of RAM, user numbers vary greatly - so it isn't really a meaure as they don't/aren't all logged in at the same time (varies wildly depending on bus space).
Hope that helps.