So there's a new iPhone, the 3G S, and some of its new features -- like a built-in compass, voice commands/feedback, and a much faster processor -- will no doubt benefit marine navigation applications.  But I've been trying the major existing apps (thanks to a loaner 3G from Navionics), and can tell you that they're pretty seductive as is.  None is perfect by any means but the three above -- Navionics' Mobile Gold, GPSNavX's iNavX, and Navimatics' Charts & Tides -- each has some interesting features.  And I've assembled a super duper screen shot slide show to illustrate...

In fact, I got a bit carried away with the screen shots, and also figured out a new way to put them up on Panbo, as you can see below.  The slide show is live here.  I'm sure I missed lots of details in these programs, but hopefully commenters can fill in.  I'd also like feed back on the image gallery, please; does this work better than the straight Picassa albums I've used recently (like the one at the bottom of this Lowrance HDS entry)?