Just got him today, for free actually from an aquarium store in San Jose, Ca called The Aquarium Showroom, you just need the coupon in the pennysaver! anyways hes my first and I already love him I wish he was bigger so I could hug him . Sorry im a fish nerd.
And welcome to the addiction that is betta keeping. ;)
I would recommend grabbing a cheapie critter keeper from wal-mart or wherever for your new little guy, it'd be a much more suitable home until you can get your 10 gallon up and running! They usually run in the $5 to $12 range. If you have any questions, check out the FAQ sticky in the betta care forum! There are also many very experienced betta keepers and breeders that are always here to help!