The wholesale price of .Org and .Biz registrations and renewals will increase in April 1, 2011, so you might want to renew any of your domains now at the lower price. On April 1 the price of a .Org registration or reneal at the wholesale level will go from $6.75 to $7.21. The price of a .Biz registration or renewal will increase from $6.85 to $7.30. Once again these are wholesale prices. What you will pay is determined by your registrar. So if you have any .Biz or .Org domains you plan on holding onto your may want to renew them before the price increase.
I was disappointed to hear about this. I plan to renew all of them I have before the price increase at my registrar economical domains