This is the first sub-$100 2GB SD card that I've seen:
http://www.ecost.com/ecost/shop/deta...email,EWB08448
OR
http://www.newegg.com/Product/Produc...82E16820170600

The rebate coupon is also good at Newegg & some others:
http://eimages.ecost.com/rapcoupons/6596eCOST.pdf

I have no affiliation with Ecost or Newegg. I found the ad in an Ecost email, but I definitely prefer to buy from Newegg.

AnandTech positively reviewed the performance of Lexar's 1GB CF card a few weeks ago, which bodes well for the SD card:
http://anandtech.com/storage/showdoc.aspx?i=2654&p=6

The rebate offer is good through the end of January, so slow-to-commit people like me can hold off a few more weeks on this purchase.