while its had some terrible maps, i feel that forge isnt just a cool thing for Halo 3, its a shout out to all game companies, saying hey, you should let the user customize things as THEY see fit, not the company...and bungies done a great job of it..i can see other Forges coming out in the future (hint nudge Infinity Ward...please please make a forge ripoff for COD4...)
Forge is an attempt to satisfy modders because they've made halo 3 almost unhackable. =D Forge is a way to keep people playing halo 3 longer than any other game Forge is awesome! But it needs more features, we're still too limited.
It also lets Bungie see what how the gamers like their maps, so they could possibly make a map like it in one of their new projects ;D
Forge is Bungie ripping down the fences and letting the players roam free (with fences, of course, such as item limits... ???). Forge is a small piece of heaven. Forge is to Halo players what the roof of the Sistine Chapel was to Michaelangelo: a blank canvas, just begging for some attention.
Forge, is like a big, unlimited tray of plain cookies, and you have an icing factory installed in your kitchen.
Forge is like a forest, with lots of bricks, but if you put the wrong brick in a certain spot, the whole forest explodes and the UNSC is all over you yelling at you for destroying the last forest on Earth and you say "Dude, calm down" and they send you in a cryogenic tube to Mars. Wow that was random !