Well yes. It costs you $10.00 per year to have your own .com/.net/.org domain name and john.doe@yourcompany.net certainly beats johndoescompany@hotmail.com whenever you are contacting somebody.
Whether you are a game developer, or an artist – get yourself that domain name.
Some sites for getting that domain name are:
GoDaddy
NameCheap
Register
Grap it.
I started coding games when I was a small kid with access to Commodore 64.
hermitC: "I’m happy that old gameplay styles prove their worth in modern times. With Grimrock Almost Human brought an awesome game to the market. Nevertheless..." 26 days 6 hours ago. 
Ashiq: "Very interesting. Thanks for sharing. I thought games like this went down since the early or mid 1990s." 26 days 9 hours ago. 
josh: "My favorite code advice is “if you need something >3 times, make it a function/object. Otherwise, re-code it inline.” Without this rule, I 1)..." 33 days 13 hours ago. 
Matt: "Hi Thomas, Nice points. I especially love the image of an army of Tamagotchi. I mean, running the supply chain for an army is really no different to Diner Dash..." 42 days 12 hours ago. 
Thomas Morgner: "The good part about games is, that they have a rather simple world. Drinks, for example, can all basically be the same thing. Add slight variations..." 43 days 3 hours ago. Matt: "Nice conversation :) about stuff I love talking about! Programming the base needs for every creation that has motivations is a lengthy task. Unless you provide..." 43 days 18 hours ago. 
Juuso: "Excellent points, that’s exactly how it needs to go. You can apply the same stuff to very many things, and there can be consequences too. Let’s say..." 43 days 18 hours ago. Thomas Morgner: "I don’t believe that you have to create a full scale AI to make a believable world. Its more about covering the basics, and working with the..." 46 days 10 hours ago. 
Just curious, but what is your opinion on using the TLD in your domain name like del.icio.us, Soma.FM, or others? Just a kitschy approach that’ll wear thin soon, or a nifty additional domain to use as a marketing tool for those who like such things?
One thing worth remembering is that you’ll get what you pay for. If you’re using a webhotel service, and use it to host downloads, you’d better make sure you’re getting enough bandwidth to service all downloaders.
I learned this the hard way when our game was featured on download.com, and the surge of users stalled the site to a complete halt. This sort of negated the whole use of having them feature the game.
@Jeffool: extra dots require extra remembering… (like… is it deli.ci.ous – or deli.cio.us… or del.icio.us) – I prefer to ‘keep it simple’.
@Ville: Very true.
I would add that if you target a less techy audience, you specifically should try to get a .com rather than a .net or any other. Everyone knows “.com” as a term so it’s easier for them to understand and thus remember.