If you can find your provider's lineup at www.zap2it.com
, then it's almost assured that your ReplayTV DVR will have it too.
With the recent announcements that there will be no more new lifetime subscriptions for TiVo units and that the "true month-to-month" TiVo guide service is now a thing of the past as one must agree to a contract term of one, two or three years at a time (w/ penalties for early cancellation), along with the raising of the price for TiVo guide service, even the soon to be released TiVo Series III Hi-Def DVR all of a sudden looks extremely unattractive, which, in turn, makes the older SD units look about as attractive as gold-plated doorstops.
If you're going to go with the older SD technology, might as well go for the more capable, more flexable, easier to upgrade/hack units: a ReplayTV 5k or 55xx unit. There's no contracts for the ReplayTV guide service when ordered on a Monthly basis - you can cancel at anytime. Or, just get a lifetimed unit for $300 once and be done with it once and for all. Remember, in 2009 (assuming that they actually make this cutoff date, or just end up doing like they'be done before: having to push it out again, and again, and again...), all that is going away is the analog TV feeds, not the analog TV sets. You'll still be able to feed downconvgerted analog from a cable/satelite box to your analog equipment. There are hundreds of ReplayTV compatable boxes out there currently, and, we have the capability of custom adding new IR control codes to the 5k/55xx ReplayTVs in the event that you run accoss a box that it can't control. http://www.avsforum.com/avs-vb/showthread.php?t=267352
It's WiRNS (with an "N") not "Wirms".
WiRNS only exists for the ReplayTV 5k's and 55xx's (still working on support for the older units - no promises though). Not to say that it doesn't exist, but I've never heard of anything even similar for the TiVo.
A good part of that is due to the differences in how the two units get their guide data - ReplayTV's can use the internet, so it's easy to just proxy the transmission and tack your own channel data on at the end of the stream; Stand-alone TiVo's on the other hand, IIRC, only pickup guide data via the modem - it's much more difficult to hijack & proxy a modem transmission, not to mention the differences in authentication, CRC/error checking, communications protocal types, etc, etc...
"Wirms", on the other hand, are something that you buy at a southern bait & tackle store before headin' off to yer favorite fishin' hole. ;)