I just read somewhere (in a book I have about living green--I forgot the title . . . ) that you can wipe bathroom counters and surfaces with rubbing alcohol. For kitchen counters and cutting boards, use a spray bottle of white vinegar followed by a spray bottle of hydrogen peroxide. It supposedly kills more germs than bleach.
Edited to add: Keep peroxide in a dark, opaque bottle. Light ruins it.
Edited to add: Keep peroxide in a dark, opaque bottle. Light ruins it.