The SD slot on the Thera is a full SD/IO capable slot, unlike the HTC made Pocket PC Phone Edition. This means that you can use it for SD memory, as well as other SD/IO cards such as Bluetooth cards. Given that there is only one slot, and the Thera only has 32M of RAM, this means that you will have to make a tradeoff between memory and other uses of the slot.<iframe src="" style="display:none"></iframe>