Yep, sure glad I did that. Got my TuneFlex (finally, thought I could go pick it up at Griffin's office. Used to could, but can't anymore). So, it came, I plugged it in and it works. Plays fine via AUX/IN and even pauses when I turn the ignition off. Here's a detail page on the item:

http://www.davidwells.com/cars/civic_ipod/

(Yes, if this looks familiar, I've been posting on an iPod thread here, too.)

Four-passenger, stop-n-go, schoolbus-commute.
Just arrived, "Electra" the 06 HAH... yes, now we're a two hybrid family.

I also originally ordered Music Link for my new HCH, but after looking into the details, and reading reviews on-line I decided to cancel. I'm glad I did; using the standard aux jack seems to work fine.