Russell Shaw at ZDNet is reporting on increasing rumblings in the Vonage user community that the quality of VoIP calls for customers of broadband Internet giant Comcast is starting to suck. That's where the conspiracy theories start, because Comcast has just launched its own competing—and more expensive—VoIP service in some markets. So, is this foul play by Comcast, just a myth or concidence, or are they withing their rights to throttle Vonage? Toss your theories around in the comments.