Both the HTC 7 Trophy and Samsung Omnia 7 have been taken apart by their owners from the XDA-Developers forum (link 1, link 2). Unfortunately, unlike the HTC HD7, neither of these two phones appears to have a user removable microSD slot, a feature we had great hopes for.
If there is a microSD involved anywhere here, it’s soldered in place so you can’t expand it.
User expandable memory is a really great selling point, and I personally think these devices suffer for not having it. Would this affect your choice of which WP7 phone to purchase? Let us know in the comments.