For those wanting to research roll call votes, NHelection.info has just completed a major upgrade of the Roll Call Engine.
New features include ALL roll call votes since 2001 with individual votes for each legislator (500,000 records!). Also, you won't have to type in your town each time, as it remembers the last polling place you selected.
Additionally, you can now view ALL legislators for a vote, AND you can SORT the results to drill into whatever suits your fancy.
Details and an updated FAQ at http://nhelection.info/rollcall.html.