Ah! I can answer a few... the sis-in-law was in town last weekend with her new 06 and it was parked next to our 03
The "Autostop Creep" thing - No. It seems to work the same as the previous model, though much quieter. The autostop is quite noticable on my 03, but you have to really try to notice it on the 06. (I think that's mostly due to better sound deadening.) The car doesn't autostop while it's cold. You need to get it up to operating temps for that to work (and it doesn't kick in, in very cold weather like it does on the Accord.) I found this to be functionally the same as the previous model, just quieter/smoother/warmer (the heat doesn't turn all the way off during autostop on the 06, as it does with the older model. The heat/AC system is run partially by the Hybrid system.)
(((There are some older threads here about a "shuddering" when the 06 autostops but I wonder how much of that was from people who aren't used to a car that does that. I noticed quite the opposite, that it's much smoother than the older car.)))
iPod: two choices: you have an Aux jack on the lower part of the instrument panel just in front of the transmission. You can output your ipod through that, using a patch cable that looks like a 2-ended headphone cable (that type of connector, on both ends.) It'll put the sound through your stereo, but you still control the ipod through the click wheel, and it's up to you to keep the thing charged.
The second option is the Honda Audio Link (a civic-only option for the 06) that gives you a connector in the glove compartment. Plug the ipod into it, and you can control the gadget through your steering wheel controls (add the voice stuff with the Nav cars.) That cable also charges the ipod. Figure $200-300 including installation. Worth the $$ if you use your ipod a lot in the car AND you don't want extraneous cables running everywhere, and "Hands-Free" control is important. (I just start a playlist and drive, so I'm learning to live without it on my Accord

)
6-Speaker Stereo: That was one of the "deciding points" for me between the full-price 06 Civic and the Heavily-Discounted 05 Accord that I ended up taking home (I left with a $2grand difference between the two cars, so I went with the Accord Hybrid since we already have a Civic Hybrid and really could use a larger car.) Anyway, we took along a "test the radio" CD that was pretty boomy and had a lot of high and low range to it. I found the two cars VERY similar in sound though the Accord is a bit richer mostly because you're bouncing sound off a larger interior surface. But I didn't see a significant difference between the two (which is brownie points for the Civic - it sounds much better than my 03.)
The 6 speakers are: 2 in the front near the windshield, 2 in the front doors, 2 on the back shelf on either side of the air intake for the hybrid system.
How much more quiet: I'm going to vote for SIGNIFICANTLY more quiet. I was very VERY impressed with the reduction in road noise between the two models (of course some of that was driving a month-old new car, and 3-year-old with almost 40k miles on it, too.) The sound insulation makes it feel/sound much less like "cheap small japanese car." That combined with a "Tighter" driving feel, if Avocados are "the poor man's butter" then this car is the "Poor man's BMW 100-series"
Front Bumper Clearance: The front bumper clearance is higher (didn't measure so I can't say for sure how much) but we have little (4-6" tall I guess) parking lot "stops" in our parking spaces at home and the 03 will scrape if loaded down heavily. The 06 is well-high of that (there's no additional front spoiler on the 06 model as the previous body style had.)
The headlights are clear white, not blue at all. Brights are VERY wide and bright (but I've found this to be true in any Honda I've driven. VERY good headlights, compared to my ex-BMW.)
The overall impression of the 06 was that, even though it was a good decision to get the Accord (so we'd be able to get ALL the luggage to the airpot with it actually INSIDE the car, and especially for that price!) when the 03 is ready to trade, we wouldn't look beyond the Civic for a replacement. It's a VERY nice car.
Definitely a "generational" change between models, though. Evolution, not Revolution.