That makes sense although a smarter device/browser should probably be able to interpret a held touch as a hover. I noticed that's something the Nook Color's browser (in non-mobile mode) *tries* to do though it can be a bit tricky in practice depending on context. Not sure what browser the NC actually uses, but it seems to id itself as Safari to websites.
And FWIW, I just tried using my wife's NC here to see, and I didn't run into any need for doubletaps, except as can happen (even on a regular desktop browser) when the current page has not completed loading yet. Also tried quoting and starting a post reply -- though didn't bother to submit one -- w/out much issue other than the need to switch to "source" mode in order to consistently bring up the soft keyboard. Not saying HTF experience on the NC would be all that great, but it's probably not too much worse than usual for me (other than the lack of hard keyboard and a need to use "source" mode). Pretty much the same when I use Bitstream's Bolt browser on my Blackberry Tour (other than the obvious diffs in hardware).
I guess it all comes down to how well your browser handles the javascript and whatever else Huddler uses. If iOS devices only come w/ what's considered a mobile browser that still doesn't handle javascript all that well, then it's debatable whether that's at least partially the fault of Apple rather than Huddler. Of course, one would still think it wise for Huddler to get on the ball and support the growing crowd of iOS devices (among others) out there...
_Man_