Sorry guize, but I'm backing up Glib :3
Basically, its better for you to get around major Drum n Bass forums like what xKore said, Dogs on Acid, Lifted, Breakbeat... etc
A really good friend of mine set up his own site like, two months ago, and in the first week he earned £70, just because he has a name for himself.
Labels have come to him, he hasn't gone to them. You don't want to send stuff to labels since you can come across cocky, and if your stuff isn't good enough, its likely thy'll reject your stuff in future.
And you need to be absolutely positive about your production, it has to be perfect or else you just aren't going anywhere.