I love it. I did some looking around and got most of my extensions to work (or found a replacement for it). I did find the theme i was using, so it isn't a problem for me.
I guess Ive customized firefox so much for myself that I dont notice most of the changes.
iFox smooth is available here:
http://www.radar.250x.com/tb.html
Yes, it works (thats what I use.)