People often suggest reinstalling the BB with plenty of grease if just tightening doesn't cure it; have someone experienced feel if the bearings are on their way out or too loose.
Your wheel noise could do with closer examination. Try to pin down where exactly the noise is coming from (perhaps ride by a friend slowly and have them try to pin down the area). Does it ever make the noise unloaded, in a stand? When you ride it, does it ever not make the noise? Try just coasting, pedaling forward, pedaling backward, applying brake, and so forth. Is the noise continuous, or does it vary over time; if the latter, does it match the wheel revolutions, pedal revolutions, or neither?