As always, there have been complaints that the Virgin phone lines on both side of the Atlantic are swamped, and can't cope with demand.
The Virgin Atlantic Facebook page seems to be the best place to get information, they appear to be supplying updated information, and links to where the information is posted.
It has to be said that the site is usually updated more frequently during office hours Monday- Friday, but I see there was info posted yesterday.
Good luck with your travels.
Edit: According to thread on V-Flyer, two of the best places to see where planes have been diverted to, and their current status; are the Virgin Atlantic iPhone flight tracker app, and the V-Flyer flight status link. The data there is a direct feed, so is kept far more current than info on the VS website.
Link to thread.
Nick