Are you by any chance on the 212.100.. ip range?
I can't get through to my webserver in the UK either (and more worrying, neither can my SA based hosting clients!! )
www.theregister.co.uk (212.100.234.54) is also unreachable.
On the line to Telkom now, been on hold for 10 mins far...
Actually, just as I'm writing this I see my email has come through, maybe the problem is solved...