I'm getting a little tired of skill challenges, myself. I don't think the mechanic WotC has provided, either the pre-errata, post-errata, or even their suggested skill challenge setups in published adventures (which often obey neither pre- or post-errata rules), is compelling enough to pay much attention to.
Besides, I think pretty much all DCs in published WotC products are too low. In E1: Death's Reach, I regularly see knowledge checks at DC 29 that tell you all sorts of ridiculous things, like what a particular enemy had for breakfast, who he really serves, why, and what his secret plan is. This, for epic characters, who hit DC 40 checks more often than not. 29? Really? Half of the level 1 parties in L4W can hit a DC 29 check if they really put their minds to it.
Anyway, all of this is a roundabout way of saying that I don't particularly like the current WotC model of skill challenges, where DCs are (ridiculously) low, but only a few failures will kill a challenge. I might use it for something where failure really is catastrophic, like, say, scaling a cliff, but for most skill challenges I'd rather have higher DCs that are really a challenge, but have a few failures be recoverable.