Phone wires are easy enough to pull, especialy if you've already run the ethernet yourself. That being said, 10/100bT only uses 4 of the 8 conductors in a wire, so in theory you should be able to run 2 phone lines on the unused conductors. You'll probably have to home-brew your own patch cables to do it, and i'm not sure how great your ethernet performance will be, but it should work fine. You should be able to buy a crimper for $20-30 bucks and read some directions on how to do it. Having a roll of cat5 around the house will come in usefull, so just buy the 1000 foor box if you can swing it.

Matthew