Seems to have been a couple of niggles today - this morning, from Cape Town at least, the recently provisioned DNS IP's (196.46.70.10, 196.2.97.234) were unavailable. Seemed to get sorted around about 9am-ish (good timing, had to get online to do VPN stuff during a conference call).
I can currently get to www.iburst.co.za, but can only authenticate in IE, the submit button does nothing in Firefox. I know there were some hiccups with iBurst during the recent billing upgrade, but between then and now it was working fine.