I really don't want to bike on Flatbush so I think zacster route is out, I may try it out early morning on a weekend. jeebusaurousrex option going through smith st is pretty much similar to going through clinton st, but the advantage of clinton st is that it has fewer traffic.
Also, I've been biking over Manhattan and Brooklyn Bridge and the Brooklyn Bridge has many more tourists, I just keep using the Manhattan. I use it mostly on weekends. You guys who ride the Brooklyn Bridge during the week are there tons of pedestrians also?
Daniel