Bangkok - Where are the places to eat?

Had all reservations and bookings done on air asia and we're going to Bangkok in March 2007. It's gonna be a 3days/2nights stay, so i'm thoroughly planning out our tour around Bangkok. Got all my maps and information ready for my planning.

Mike and I have never been there. So we arent very sure what are the places to visit and the must eat dishes in Bangkok. Well, looking at the information that i've gathered, the only thing that i've settled so far is "places to visit".. seems like the districts are very much uniquely divided to its own culture and there are quite easily accessible...

Unfortunately, the food part is a bit difficult as they don't tell you where the street foods are situated at... i'm wondering if there's any street food in Bangkok area (i.e. Sukhumvit, Silom, Chatuchak districts) ala our very own Malaysian Petaling Street or Jalan Alor or Bangsar pasar malam.... if there are any, it'll be excellent... that way we wont have to hunt all over the place and get to taste abit of everthing in just one street!