1. about 2/3
2. about 95%
3. a little over a year
4. since January (so four or five months)
5. maybe $75 to $200 depending on how many goodies I buy.
6. not blindly, but probably if something looks useful or interesting to me
7. $100 to $150 or cheaper probably
8. The machined parts to convert a Sturmey Archer for $50 would be a sweet setup
9. Sturmey Archer model AW (the classic three-speed) and soon I may have a Shimano Nexus 8 speed.
10. nothing commercially available anymore. Sturmey Archer made one long ago, but they are disgustingly rare and expensive now, as very few were made. There are plans for converting certain three-speed hubs on the web that have varying degrees of success. A commercial adaptation with properly machined and hardened parts to do one of these conversions would be a great start.