Yay Leeanne - That's definately baby - That's what I've been feeling for the last 3 weeks or so! Still waiting for the definite kicks and prods though - this is my first so I only know about the fluttery buzzing spasms!
psycholisa and vickilouise the sensation will probably be quite low in your pelvis, but not nessecarily in the middle and I can tell the difference from Gas and Wind as that is much stronger and more 'poppy' and is happening closer to my bellybutton!