What's interesting is that they are limiting this borderless currency to US-only. But it doesn't take much to start accepting from other countries after they get through the legal complications, it probably won't take too long :)
Dell isn't actually doing anything with the Bitcoin, they're getting USD payments via Coinbase. And Coinbase appears to be US only and maybe US bank only? Their site says:
"Right now the only supported payout option is USD to a bank account. However, options for other countries are planned."
Which is a bit ambiguous but I think it may be only US bank accounts (or accounts accessible within the US system)?