Thanks, Joe
[edited by: ToadWhipserer at 10:15 pm (utc) on Nov. 29, 2008]
As you rightly suggest, "everyone assumes it's .com" - but, worse than that, some browsers and other software have that assumption built in.
It's possibly worse still when the .com is unavailable but unused - they can not only steal your audience, but your ideas, too! (It's easier if it does exist, and it's rubbish!).
There reality is that once a site is built and starts getting links it will stand on its own. It will rank in the SERPs. It will be bookmarked.
Yes, there may be a smattering of "Oops!" moments, as people learn they're in the wrong place (.Com vs. .Net) but that's just part of doing business on the WWW. People search.
I think the more important questions are how committed are you to the success of your venture and how "able" are you to deliver?
.Net vs. .Com tends to be a temporary inconvenience, a matter of seconds.
I'm finding that to be true myself being in a situation similar to the OP.
Even after more than a few months, I still find myself typing the .com by mistake. It's almost like not being able to speak certain words and just stuttering instead. Da, da, da, dot com. No! It's .net.
And then you'll get the wise arses who say dot what?
ASP.NET < That's a humdinger! :)