I am not sure, if you looking for travel forum for the world or a specific region. One of the forum for India which is very well known is www.indiamike.com Lonely planet has its own http://www.lonelyplanet.com/thorntree/index.jspa Another one which is going to reach a million users soon! http://forum.virtualtourist.com/ hope this helps! cheers nirav
Bootsnall is a good one, but be aware that they want you to participate, not just post trip reviews. Why not start a blog for that?