Yeah I thought it was too at first but then i noticed you said:
90 days worldwide availability of 3G.
Whereas this says:
The Wi-Fi + 3G models of iPad will be available in April in the US and selected countries
So it looks like they never promised worldwide availability of the 3G version. <shrugs>
I'd be amazed if 'selected countries' didn't include the U.K.
Weren't we the first country (after the U.S.) to get the iPhone back in November 2007?