One of my reasons for not being as interested in libgnokii was that it didn't seem that there's a true way to read an SMS/MMS message through it. You can extract it from the phone's memory, but it's not as seemless as receiving a phone call nor sending an SMS/MMS message. That's definitely something I think is missing from these capabilities.

Ideally, I'd want both sending and receiving an SMS/MMS message to appear on the tablet to have the exact same user interface as Instant Messaging with your contacts. It's just that the underlying transport is SMS/MMS through libgnokii, instead of Jabber/AIM/etc. Receiving it would be just like you were on-line with Jabber and received an IM, for example. You'd get the same throbbing icon that indicates you have a waiting message. And, if you just reply to it, you might not even have to notice/care that you're doing SMS instead of IM.