It's too bad this question and answers to it are still showing up nearly 2 1/2 years later. Prices in Northern Virginia have been on the upswing for nearly a year now (August 2009) and are above last year's prices as a whole by nearly 14%. That's in Fairfax County alone.
If you look at communities (which is a ground level look at pricing) you'll see prices up from 1 - 15% depending on the community.
The majority of housing in Fairfax County is now "normal". Only 18 percent are considered distressed (short sale and bank-owned). Prices on the rise, inventory is low, and interest rates (the most important part of the financial question here) are at RECORD lows - some as low as 4% for fixed rate.