You mean websites? Of course, I'm from YoungComposers.com. It's a great site, trust me. The forum is VERY active, and the community is huge and very nice. Please check it out, you will see that the site and forum is very expansive.
Probably best to have your own website. People will probably take you more seriously if you develop the time and money for one, and they can be very cheap and maintained with little hassle. My 2 cents anyways...
Re: Submitting compositions.... 16:28 on Saturday, May 24, 2008