Is it possible to somehow connect my blackberry to my laptop, and get internet access?

yes, you can via blootooth and usb as well.

ok, i have a USB hookup, how would i go about setting it up?

No, you can't do this via bluetooth. Only USB, and only with particular Blackberry models.

There's a sticky post in these forums that details how to set this up.
( [User] HOWTO: Use BlackBerry As Modem For Laptop! )

Figure out which Blackberry you have and you can find out if it will work for you or not.