So I have been reading a lot about how the TiVo HD doesn't support MPEG-4 from the provider. Is this something one should worry about right now? I have seen some people say that their providers have switched some channels (HBO, Cinemax, etc.) over, and some have switched all channels. Do we have any indication that the conversion for most providers are coming soon? I ask the question because I just bought a used TiVo HD!