To be fair, a service the size of Rackspace Cloud is bound to screw up at least a few times. Then again, no one ever got fired for switching to Linode.
Is it just me, or are their other datacenters slower than their London one? It might be the latency, as I was actually in London, but the one I have in Georgia doesn't seem to have that fast disk accesses... Bottom line, though, the London datacenter is just time-traveling fast.