swcast.net charges about $12.99/mo for about 20 listeners listening 24/7. You can paste the code for the ads on their site and then your stations link would be something like this:
http://stations.swcast.net/yourstationYou can't launch the stream from your web page so you'd have to use a chat box servers like gagalive or several other free chat box services for your station to take requests.
Loudcity offers a complete licensing/hosting package costing $24.99/mo and you get 10 GB's of AutoDJ and 10 listener slots. If you want more slots or storage think $10 for either 10 more listener slots or 10 more GB's of storage.
If you want to sign up for a station legally you can use Loudcaster's service:
http://myradiostation.24ex.comThen again I don't know if your in any trouble with a small service like the free shoutcast hosts because you may get 5-10 listeners a week but if it really bothers you then I'd suggest Loudcaster only because of the AutoDJ because you can run it 24/7. Being licensed does have privileges such as getting your Radio station on huge publishing services that will allow you to post your station such as Radiotime.com streamfinder.org and a host of others.
Hope this helps.