Is there anything I should know about settings for exporting DDS images in Photoshop? So far, I only know this:

DTX1 is for a solid, no transparency image
DTX5 is for transparency support

Anything else I should know about other settings before I export my PSD to a DDS?

Well, I've learned that the DDS plugin that I have does not like to save anything larger than 2048 x 2048.