I made a thread about baby bettas a while ago although it didn't get very many replies so it probably wasn't the one you were thinking of lol. They are super cool! I bought three. They weren't too much trouble to take care of. when they first came into the store you couldn't even tell what color they were because they were so small! Mine have totally changed since I bought them. I feed them 3 times a day. (when I'm not at school, when I am they have to settle for eating twice a day with bigger meals) I do 50%water change every other day. They are super cool and seem to be much more willing to interact with me than some of my other fish have been in the past I think they are more outgoing since they are babies! So far I am almost positive that the first one I bought is a female but the other two are so small that I have no idea what they are still! My theory is that since they aren't growing at the same rate the two smaller ones are probably boys (although I know nothing about the development of juvenile bettas) They are lots of fun! but if you get one I wouldn't bother with the "baby betta starter kit" they outgrow the tank in about 3 days and it doesn't come with much food.
OH!! haha oops I thought you were still debating on getting one!
I hope you enjoy your baby betta adventure as much as I have!!