So far in the line of new WP7 devices ... this HTC device seems to have a better idea. At least there is NO memory expansion ... similar to the iphone ... unlike the "expansion" on the other WP7 devices. At the very least if I was looking at a Samsung Captivate, an iphone 4 and an HTC HD7(this phone) I wouldn't expect a microSD card to work like they normally do and I could base my decision off of that.
Even a basic quick messaging phone will have a microSD slot for removeable memory expansion. It makes more sense (from a one-time memory update standpoint) to just have no memory expansion and put the extra GB's in the phone itself. Even from a marketing view ... this phone seems like a better idea.