Can you change the options when long pressing the .com button? When you longpress the .com button on the keyboard, (on my 2.2 htc legend anyway) it gives you the options to select .net .com .org .edu.

Is it possible to change these to other options?
With the stock keyboards, no. Some 3rd party keyboards may allow this, but I don't know any. There are some keyboards that have additional options too.