The dementors are going to feature prominently in book 7, I think. All that breeding...
Reading THAT little gem in the book gave me the creeps, lol. Since conjuring a Patronus is such a difficult thing to do, I wonder how the wizarding world would deal with a bunch of baby dementors...ugh. One would hope they wouldn't be as strong as a "regular" dementor. Like you, I'm pretty sure that will come into play in Book Seven. More recruits for Voldy. *sigh*
Ewww...just the thought of that is gross. I hope they breed kind of like a cell splitting rather then....the other way....ewww
Some of us have wondered since PoA how Dementors reproduce. There was a theory that had some following which suggested that it's possible those who recieve the Dementor's Kiss become Dementors themselves. Although of course there is nothing to back this up in the books. It was a rather horrifying idea, though.