If you're really feeling down about the price you recently paid for the 8 or 16 GB version, try a different perspective. Think of all the money you saved by not buying a lower-resolution, lower-performance, higher-priced tablet like the iPad mini. Enjoy your Nexus 7!
More to the point, look at the purchase you made - a 16GB Nexus 7 for $250, and compare that to anything OTHER than a 16GB Nexus 7 that is on the market today, months after the release.
The only thing that competes is... Google's own price drop on the same item, and Google's new product with more memory (and no other new features) for the same price.
If I went into Staples today and they had a 16GB for $250, it would still be a better deal for the features I want in a tablet than anything else currently on the market.
Honestly, Google upped their game and they didn't need to. They need to hire MC Hammer for marketing, because, "I'm telling you, homeboy. Can't touch this!"
EDIT: This is, of course, assuming all the rumors are true. Given Apple's honestly somewhat disappointing announcement, Google could still bring back the 8GB for $200, keep the 16GB at $250, and introduce the 32GB at $300, and it would still blow the doors off anything else out there from a value-for-price perspective.