1) We can't announce anything yet, but our current 13.5" Framework Laptop will certainly not be the last product we ever build!
2) See question 1.
3) We've designed the bezel to be color customizable, and there are some photos of orange and white ones on our website. We'll be adding more colors as we go. For the chassis itself, it is anodized aluminum. We don't currently have plans for additional aluminum colors though.
4) We have a custom keyboard with 1.5mm key travel scissor switches, which is longer key travel than most other <16mm notebooks.
5) We can't announce anything on Thunderbolt compatibility until we complete certifications, so keep a look out for that.
6) The internal battery is 55Wh.