There are memory card readers that you can plug into a USB port.
Sometimes called "media card reader" or "memory card reader."
Sold at your local computer, electronics, and office supply stores. Online stores often have the best prices for these. You should be able to find a model that can read all the types if media cards you listed.
Can anyone tell me if they know of an adaptor (via USB) that will hook up to a computer that doesn't have an (mini/micro) SD or Memory Stick Pro Duo allowing you to thus use retrieve the data on the SD card or memory stick or will I just need a comp. with either of these slots on them?
P.S. Sorry I do not know if this belongs in this forum but I did not see any other place to post where it would be appropiate.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic