If you have already pre-ordered, or were planning to pre-order, the $300 PS Vita with wi-fi and 3G support from Amazon, you're privy to some extra bonuses. The unit now ships with a crucial 8GB memory card, a free month of "DataConnect" 3G access (or 250MB, whichever comes first, a $15 value) and, as part of signing up for the DataConnect service, a free PSN game.
Right now, Amazon is the only place we've seen this specific offer. We're checking in with Sony to determine whether this offer applies to 3G/wi-fi Vitas sold elsewhere. However, it's a sticker on the box art shown on Amazon (above). That doesn't look retailer-specific.