1-It is perfect for recreational riding. I have over 10 years of "bike experience" and I can easly forget my halfway is a folder. It takes about 10 miles for you to get completely used with the 20" wheels if you are coming from "regular" wheel size.
2-Very simple, any Giant dealer will have the conventional Halfway for you in less than a week. For the suspension one, try E-Bay and pray hard.
3-Not yet, but as Ruchai said, doesn't look like it should be a big deal
4-Again, besides the wheel size, It is a very, very impressive bike.
Rafael Guerra