Microsoft announced that "starting June 28, 2010, size limit of SQL Azure Business Edition increases from 10-50 GB and SQL Azure Web Edition database from 1-5 GB." Please note that if you elect to increase your existing databases to take advantage of these new sizes, there're additional charges. Refer to comparison table for more details by offer on pricing. Also releasing pricing preview on June 7th, 2010 on SQL Azure pricing.
Starting Aug 1, 2010, we'll also release new SQL Azure Development Accelerator Core promotional offer, that give you flexibility to purchase commitment quantities of Business Edition independent of other Azure platform services at a deeply discounted monthly price. You may purchase in 10 GB increments amount of Business Edition that you require (each Business Edition is capable of storing up to 50 GB).
The offer price will be $74.95 per 10 GB per month. This offer represents 25% off of normal consumption rates. Monthly Business Edition usage exceeding purchased commitment amount and usage for other Azure platform services for this offer will be charged at normal consumption rates," revealed Microsoft.
More Info: SQL Azure Development Accelerator Core