According to VM's monthly catalogue, it looks like the pricing has been confirmed for $299. So it looks like it is safe to preorder from Bestbuy because it is unlikely the price will go down ... you might as well get your phone early.
Virgin Mobile's July Catalogue
In case you missed it, they are also increasing the prices of some plans (as seen on the catalogue) and on this thread:
http://androidforums.com/virgin-mobile/370015-vm-rate-hike-what-will-you-do.html
Virgin Mobile's July Catalogue
In case you missed it, they are also increasing the prices of some plans (as seen on the catalogue) and on this thread:
http://androidforums.com/virgin-mobile/370015-vm-rate-hike-what-will-you-do.html