I'm looking at doing it to my Sirrus.
Priced it out to about $150-$200.
You'll need:
Drop Bars
New Stem
Shifters
Brakes
Bar Tape
Probably Cables too, unless they come with the shifters/brakes.
For Shifters, I would use bar end shifters.
For Brakes, get some Tektro RL520 Ergos:
http://www.jensonusa.com/store/produ...ke+Levers.aspx . They should work with the current V-Brakes.
Look into it and consider if its worth it.