A new Reuters poll released today shows Diane Farrell with a 5-point lead over Chris Shays (46%-41%), and Rob Simmons leading Joe Courtney by three (44%-41%). It's definitely worth noting that no candidate has broken 50%--these really could go either way right now.
No poll for the Murphy-Johnson race, unfortunately.
Whitesides, John. "Results in key House races: Reuters poll." Reuters 4 October, 2006.