Does your tablet have bluetooth already? If not your going to need a dongle or adapter to plug into the laptop/tablet to get it to connect to the Mogul as a hands free device.
I can use my Logitech's bluetooth receiver that came with my keyboard and mouse to connect to my cell as hands free so I know its supported just have to have a bluetooth on your tablet that supports the hands free protocol.
As for something to let you send and receive texts from the tablet Dashwire works good but you have to have internet on both devices at the same time. Dashwire on a stock rom is a memory hog.
It would be nice if you could have an all in one that would let you use it over an activesysnc connection. I saw the redfly and if we could hack together something like this for our tablets or laptops it would be a cool program
http://www.celiocorp.com/ trouble is figuring out how they do it and making some kind of emulator program that emulates the redfly inside a window on xp or vista machines that have bluetooth.
If such software already exists - the my moblir bc it kinda sux @ 320x240 and is kinda laggy bc it relies so much on the titan to do the display the redfly looks to have its own cpu and ram that does some kind of display processing.