Welcome to the site!

About biting...ball pythons are very docile and shy creatures. I've found that they'll ball up and hide in fear rather than bite at all. Usually the only time you'll be bit is if you're feeding them and they sense rodent on your hands or something. That or if you've just fed them, and you put your hand in the tank when they're still in "feeding mode", they're known to strike too. I'd just recommend you be as patient as possible(I know..it's sooo tough ) and leave him alone in his tank to explore for another 5 days or more, to make sure he's acclimated to his new home. This can be a stressful time on a ball python, so it's best to leave them be, then try feeding them a week later, and if they take it, then a few days later(gotta digest ) you could probably handle him.

Oh, and sorry to hear you haven't gotten a thermometer yet. Might I recommend a trip to Walmart? If you can, try getting the "Acurite digital thermometer/hygrometer". It's found in most Walmarts, and runs you about 15 dollars. And worth every penny. It gives you accurate measures of two temperatures(probe for one side of tank, then place the device itself on the other side of the tank), and measures humidity, which is key to keeping a bp.
Also, what type of bedding is that you're using? Oh, and what are you using to heat the tank? Again, if you're not already using one, may I suggest a human heat pad from Walmart? They can run 10-15 dollars, and work like a charm. All you have to do is put it underneath(not inside) the tank on one side. That'll heat the tank in a gradient fashion, so the snake can choose from a cooler side, or a warmer side if he likes. Under tank heaters are good because it should heat up the tank very nicely, therefore you don't need a light for heat. Since ball pythons are nocturnal, they don't need light at all, and it usually stresses them if left on for long periods of time. That, and they can dry a tank out and suck up humidity, lol. Here's a pic of the heat pad most people on here(including moi) use to heat our bp's enclosure. It's popular, yes, but any heat pad will do, aslong as it doesn't have auto-shut off.
http://novogate.com/forums/1647/user/23319/9707.jpg
Anyway...I've rambled as usual. I just wanted to cover anything I could think of at the time. Any other questions you have, don't hesitate to ask, as you know.