I just received the January issue of "Contract Programmer" magazine. The cover story is the 2000 Rate Survey. These are national averages for the US:

Visual FoxPro (yes, it was a separate category)
Contract: $48.67 hourly which is $93,446 annual
Corporate: $62,000 annual

Visual Basic
Contract: $48.93 hourly which is $93,946 annual
Corporate: $56,000 annual

VC++
Contract: $34.67 hourly which is $66,566 annual
Corporate: $62,000 annual

SQL Server
Contract: $55.07 hourly which is $105, 734 annual
Corporate: $63,000 annual

You can get more information on this survey at www.cpuniverse.com.