first off you will need a wireless router.  you will also need an ISP that does not use a phoneline (if you don't want to use one as you said).  this can be a cable or DSL provider.  it should work with AOL Broadband.  Your broadband ISP will provide you with a DSL or Cable modem which you will plug into an ethernet port in the wireless router.

 

some wireless routers do come with modems (or ports to connect an external modem).  these are much more expensive but will let you continue to use some dial-up ISPs.  They will probably not work with dial-up services like AOL.