They don't take web orders, you submit you want to order something and they contact you supposedly after 24 hours. They do handle international orders though. Jasong, I wrote I found the link in the mechanics forum, I just knew that people don't always check other parts of the forum out.
Yangmusa pulled-up beside me on his Swift at the train station the other day with one of these installed under his saddle, and I must say it looks very trick, and smaller than it does in pictures. Expect a review from him soon.
This was posted by yangmusa in the Swift thread, I'm ordering one tomorrow!
Originally Posted by yangmusa
I bought a butt buddy. Yes, really.
Check out this page at Sidetrak.com It's basically a steel spring with urethane dampers, so it does something similar to the Cane Creek Thudbuster.
Unlike the Thudbuster, it is not intended for offroad use - instead of several inches of travel, it has 6 mm. The urethane is also very stiff. It doesn't sound much, but from a week of riding it I can say that I'm starting to like it. It takes the brunt off the worst bumps & potholes here in SF, and seems to remove some road buzz from the aluminium frame.
My kitchen scales say it weight about 250 g (just under 9 oz) - about a quarter water bottle.
James_Swift wondered if it starts moving or oscillating when spinning at high cadences. The answer is, I can't really tell. My spinning technique is lousy and I just start bouncing in the seat. But I don't think it does, at least not as I can tell.
So all in all, it doesn't perform miracles, but it does seem to reduce the worst bumps. I hope it will reduce fatigue on long rides. I've signed up for the San Francisco to LA Aids/Lifecycle ride, and am considering doing all 545 miles on my Swift
Edit: I find that it works best when I'm sitting relatively upright. When I'm on the drops I have much less weight on the seat, and I don't notice it doing so much. YMMV.
Just an update now that I've ridden on it for a week: I ordered this because I wanted a little more height and that's just what I've gotten. I've got the Thudbuster XL as my seatpost and didn't need the suspension the "Butt Buddy" brings. But, with a 450mm seatpost and my 6' 0", I couldn't get those last 2 inches of height necessary. The "Butt Buddy" added about 3 inches of height, which allowed me to no longer put the seatpost at full extension, I've got it an inch more down than the max limit.
So, if you need that extra little bit of height, which can be a problem with folders if you want more of a road bike geometry, grab the "butt buddy." And they ship super fast (got from Seattle to NYC in 1 day priority mail).