At last we've managed to move SiteVista and the rest of our parent company, Salted, over to a new hosting provider. Previously we hosted with 1and1 (I don't want to give them any link love but you can Google for them) and were wholly unsatisfied with the service.
Now I'm delighted to annouce that as of yesterday (Thursday 10th November) all of our servers are being hosted by Blacknight Solutions (affiliate link/non-affiliate link), this new hosting partnership will give us the stability we need as SiteVista scales.
The guys at Blacknight have bent over backwards to help us get setup, so big thanks to Michele and Paul.