I'm hoping that maybe the next one will be the last beta needed to be released, or at least extremly close to it. Basically it depends on what bugs are found and how long it takes Jim to squash them. Part of that is the reporting method for the bugs found and if they are immediately repeatable. If so, then it's easier for Jim to find the cause in the code and repair it, if not it takes longer.
I don't think originally Jim expected the forum Beta tests to last much longer than a month or so. Generally speaking, the Alpha testers do a great job getting things to this point and finding 95 percent+ of the bugs that are there with the wide range of testing equipment our Alpha people have.
Mostly the Beta is for a bigger range of various equipment/software testing after the Alpha's are done to find any problems that way. The final call is of course up too Jim, but I don't expect there to be that many more Beta's needed unless some unforseen monster problem rears it's ugly head.
