I purchased it tonight through palmgear and did not realize I entered the wrong email address (misspelled it....Imaggie Thaat!
Had to contact their support by way of email and hopefully they'll get around to responding soon.
From what I read on their website, you can download it, but only a small portion of the program will work; I think just from the start screen. Pay for it, and skies the limit.
I figured that if it really does threaded sms, then $20 is a cheap price to pay for it.
Based on so much of what I've read on these forums, I suspect that you have to install one of the AKU's to get the threaded sms to work; and since I am so unfamiliar with what an AKU is, I'm not ready to chance screwing up something.