I'm agreeing with the Specials integration. Right now I'm having a problem with EZP shifting my specials to other products since the product IDs change when I do an upload.
I really like EZP and would love to have a Specials field in it so I could do it all in one place.
I'd be fine with uploading my whole data file if it actually deleted products that wern't on it anymore, sort or an overwrite feature. It sounds scary, but having to go through and manually delete everything is pretty tedious.