Trusted Reviews has a great comparitive analysis of 4GB Compact Flash memory cards and 2 GB Secure Digital memory cards. Provides write and write speeds for various tests and a summary of how each card performs.
Recommended CF: Kingston Elite Pro 4GB 45X CF card
Editor's Choice CF: 4GB Lexar Professional CompactFlash 133X card
Recommended SD: Kingston 2GB SD Ultimate card
Editor's Choice SD: Lexar 2GB Professional 133X SD card
