Good analysis
Unlike the US, there has not been a political re-alignment in the UK; places that voted Labour 50 years ago still do today (broadly). The best way to look at the US is imagine that the re-alignment never took place; the Labour party do wel in the south and 'rust belt' states and the Lib Dems do well in some left-liberal urban states and perform well in economically left leaning farming states
Maine: I'd be broadly with you on that one
1983 - CON
1987 - CON
1992 - CON
1997 - LAB
2001 - LAB
2005 - CON or LIB
2010 - CON
New Hampshire:Solidly Conservative from 1983 right through to 1992, I think the Conservatives would
just hold on in 1997 only to loose it in 2001 to the Lib Dems. It would be a favourable state under Howard's leadership so I see it as a Tory pick up in 2005 and a hold in 2010
Vermont One where we would have to take into account the genuine changes in the state. 1983 to 1992 Conservative, Labour pick up in 1997, hold with a bigger majority in 2001 only for it to fall to the Lib Dems in 2005. Labour could have picked it up again in 2010 in a tactical anti-Tory vote
Massachusetts Tories could challenge here on a good year like say 1959. I imagine they would have won this state in a close three-way in 1983, losing it to Labour in 1987 who then hold it. It would have been susceptable to a Lib Dem assault in 2005 however the Catholic vote (which is Labour) cannot be ignored.
Rhode IslandLikewise, Labour right through (probably even in 1983) and not really a Lib Dem target
ConnecticutConservatives win here in 1983 and 1987, hold on in 1992, loose to Labour until 2010 when I think the Tories would pick it up
New York Labour probably winning this state every election post 1983
New JerseyI would have the Tories winning strongly in 1983, 1987 and 1992. Labour win in 1997, 2001 and probably 2005. Either the Tories pick this up in 2010 or fall just short
DelawareConservative in 1983, then Labour. Lib Dems could do well here in 2005
MarylandSolidly Labour
Pennsylvania Swingy McSwing. Thatcher would be annoyed not to win here in 1979, but would have picked it up in 1983 and 1987 and Major would have held in 1992. Labour win big in 1997, probably bigger in 2001, Tories get a big swing to them in 2005 but Labour hold on. Who wins in 2010 is down to a turnout war.