I have a love/hate relationship with 41st Street. On a fixie or Single speed it adds a bit of Newtonian love to the end of a long ride. 
@CCrew: I still really want to do the Allegheny Passage. I’ve done parts of it while on holiday in Pennsylvania. I just need to find the time. Last summer’s tour (Up the east coast to the eastern end of Adventure Cycling’s Northern Tier, West through New York, South to Cleveland, then then the cut-off to Pittsburgh and home via the Allegheny Passage) got skipped over due to a shoulder injury. Went to Costa Rica instead. Maybe we’ll do that one in 2012.
Thanks for the inspiration.