IRC is not allowed on the Internap network from my understanding, but only on their BGP segment. I could be wrong, and for that, it would probably be best to contact their sales dept.
On another note, you may also want to email GigeNET. They do offer a value network with DDoS protection, though it will be more expensive then FDC if I recall correctly. There's also AWKNET on the west coast. I haven't used them, but their clients appear to be satisfied.