Does anyone know any good add-on memory mp3 players?
In other words, I'm looking for a good mp3 player where I can add on flash memory.
Thanks in advance.

Check out http://www.dapreview.net
If somewhere, then there you'll will find players with exchangeable memory modules + reviews.

I was due to upgrade my phone and noticed many play MP3 and have mini SD. Figured I might go this way since I carry a phone around anyways. Here's the one I was most iterested in:

http://www.samsung.com/Products/MobilePhon..._A920WSSXAR.asp

Review of the Sandisk Sansa e200-series, which can take SD cards for expansion.