I also plan to have my dvr set just in case but i don't expect anything. Besides not being in any current online listings, but i've been keeping my eye on Disney Channel the last few weeks just in case any promos or special Muppet commercials came up, but NOTHING has been promoted on air at all. I find that especially telling. No promos, no announcements, not even a resurgence (that i've caught) of any of the Muppet clips saying "I'm ___ and you're watching The Disney Channel"
...and btw, for what it's worth, i'm reserving judgement about the whole situation until more info comes forward as to why this got postponed. I don't want to jump on the "evil-Disney" or "Disney hates/doesn't know what to do with the Muppets" bandwagons. I mean, heck, they MADE the special and they (even though there were no commercials on the channel), they did release publicity about the special when they obviously planned on airing it.
Keep in mind, this is not just a "Muppet special", this is a big Disney Channel love-fest that features its hottest stars. Fans of these various stars/shows who heard about it and are also scratching their heads along with us are also disappointed. This WILL surface sooner or later, the question is when (will it air instead) and why (was it postponed)?
Dare we even hope it could even be for a _good_ reason such as they want to do an even bigger publicity push or want to have the Muppets tape some more stuff for the channel to coincide with it, or that they may be working on having it push off something bigger in the works?