Did they flower? and if they flowered were there any bees around to pollinate them?
When you do tomatoes again prep the hole youplant them in with 1/2C epsom salts mixed in with the soil. contact your local extension office and bring them a soil sample for testing. pH is very important as well as NPK.
also read the Frog and Toad chapter "The Garden" Decide if you are more like Frog or Toad, then decide if Mr. Fobble is more like Frog or Toad. Emulate the appropriate character in the book. Report back to us.
Also read this:
http://tomclothier.hort.net/page35.html