My butt kills after a long ride, and I want to be able to do a week-long trip later on in the summer. It's basically an inflatable seat:

http://www.rohoinc.com/recreational/products.jsp

never heard of it but it looks like a good idea and would probably help with the butt pain.

Huh . . . cool idea.

I haven't had experience with those.  I have looked into the strap on gel pads for the seat.  Also I know some people have tried wearing those gel padded bicycle shorts under their gear.  Interesting idea, but could be a real pain to deal with an extra layer of thick padded clothing.  

Yikes, I just looked at the prices!  

You could probably get a Corbin or Suzuki gel seat for that price.  I know the gel pads I was talking about are somewhere between $50 - $100.  That sure beats $200.

Good luck, I hope you find something that works out.  

I own an Airhawk saddle cushion, and have had it for about a year and a half.  I used it on my cross-country trips on my GS.  Literally saved my ass.

Advantages:
-COMFY!  Makes tank-fill-up-to-tank-fill-up runs not only tolerable, but comfortable.
-Underside of cover does not slip on seat
-Removable, washable cover
-Comes with patch kit
-As easy to inflate as a balloon--air valve is easy to use too

Disadvantages:
-Raises seat height about 1/2-1 inch, depending on inflation
-Kinda feels insecure on your seat--it will shear laterally somewhat if you shift around. Take it off for twisties
-Expensive
-Completely isolates vibration, which is nice after you get used to it but at first gives a complete sense of disconnection from your bike, like you're not sitting on the seat but floating in the air an inch above it

That should just about cover it.  If you are having trouble flatfooting the GS at stops, or you don't go long distances much, you may find the Airhawk to be a poor investment and a cheaper sheepskin or gel seat may be enough for you.  As someone who goes far on two wheels, though, I find the Airhawk to be absolutely essential.

It looks like a medieval torture device, the iron maiden specifically.

Quote from: DomIt looks like a medieval torture device, the iron maiden specifically.

Indeed it does.  However, it is not made of matte-finish steel or cast iron, as the picture leads one to believe; it is a soft rubber.  The upside-down-ice-cube-looking things are actually hollow inflatable air cells, and there is a "snake", consisting of a single constricted tube, that runs through all the cells in the pad.  This allows air to slowly leak among the cells, but not quickly.  Therefore, your weight is supported quite evenly, as less-compressed cells fill with air from more-compressed cells as you ride, so no pressure points form.  It feels sort of like sitting on a laid-out balloon wall from one of those carnival booths, but only very slightly, as the cells are relatively small (about 1" cube at full inflation).  And no worries about the silly-looking thing being put on your bike--it has a sensible-looking black cloth and mesh cover, with grippy anti-slip material at the bottom.  Quite luxurious, you're not shelling out the bucks for nothing with this thing.  Once I quit being lazy, I hope to cut out some of the stock seat foam on my bike and maybe put a sheepskin cover on my pad and install it permanently... now that's what I call kissing your own ass!

Quote from: Gleanerizer-Expensive

Yikes!  You got that right...