If you live out in the boonies, you are most likely out of luck. You can use your phone and DSL at the same time. No need for a second phone line. If so, then there is a good chance that you can get cable Internet service from your local cable provider. The concept behind cable Internet is a simple one.
Phone lines are small, cable lines are big.
Well, with cable Internet that depends on many, many things - where you live, the quality of the cable lines, and whether or not your neighbor is a bandwidth hog. Like a cheetah on a caffeine high, Cable Internet can send you to the 200kps download and 40 - 50kps upload speed zone. Your area may not have cable as an option yet. Also, cable Internet is a 'shared bandwidth' environment. Well, if your neighbors are all trying to download a huge file at the same time you want to view an online news cast, get ready for 56k flashbacks.