Diaetease has been around for a long time -- at least two years (just take a look at the clipart of the old glucose meter, and the announcement of supporting two new meters which happen to no longer even be in the market!). I think OneTouch Gold attempts to do this same thing.
There are actually over 20 different on-line systems around (this topic is part of my Master's thesis) in several countries. I found some that look like projects done over the weekend, and some are quite elaborate. I think someone even attempted to start a system on Sourceforge.net, but never uploaded any code. One student over on the childenwithdiabetes forum did his Master's thesis on the idea of a peer-distributed database of glucose values (like Kazaa or those other file sharing networks) -- I'm not sure that sort of idea would ever float, but I think his basis was to allow comparisons with other people to determine which kinds of foods to avoid. (He never got that far -- they stopped research at the point of just writing a distributed database). I think his Java source code was available, but I don't think there is much potential to take off any ideas from that lesson...
Cerner Corp. is probably one of the largest companies that makes claims to a diabetes glucose management system, mostly for kids, which allows parents to relay their glucose values to a doctor, who can then review and suggest changes to their treatment. It's specifically aimed at kids, but of course, they filed for a bunch of patents around the technology in their multi-million dollar healthcare architecture for hospitals/doctors' offices.
I think it would be awesome to have a way of sharing database information, such as through the WSDL that Bryan was mentioning. (I still have yet to look into WSDL, though I'm guessing that it's XML wrapped up?).
I was hoping that my Liveabetes.com work could be included in Bryan's system, but the data mining attributes require a lot of processing and the data gleaned from it still requires much interpretation; it also requires a lot more logging of events -- more than just blood glucose. But maybe the idea of sharing information between sites would be something we'd see, so that people can use "features" from each site that they prefer to use!
Time to go back to bed.
Oh yeah... in all my research -- I have never encountered a site that actually allows sharing of glucose values with the public (though sharing with doctors or a specific user list is a theme found in several). The concept of Diabuddies is unique from all the others in that people can look at each other's logs without an invite...sort of like Myspace.
