I've decided to take the plunge and I plan on wiring up my home to have ethernet, cable and voice in each of my bedrooms, ... Recommendations for wiring up telephone lines.

It's not 2 pair, it's CAT5e (probbly) with only a single pair punched down at the jacks (for one phone line) Additionally 802.3af/at POE uses the same 2 pairs as 10/100.