Storage/Shipping of DNA at ambient temps - (Jul/01/2009 )

Is the best way to ship/store DNA at roomtemp (pcr primers, in this case), to dry them down with a speedvac or something, and then rehydrate later?

Yes, that would work. You can dry DNA onto filter paper otherwise, and then recover it in tris. This is especially good for plasmids.

Won't it just be easier to send the primer sequence and have your recipient order it instead of mailing a sample and worrying that something will happen?