Thats a load of questions, I can't answer them all, because I don't have one yet. Hopefully someone else can fill the rest:
"What price range do we talk about, will it(ArcadeFPGA) come boxed in a type of case/tower?"
200 Euro + Tax I believe. Does not come in a box buy you can buy a mini ITX case from Ebay and put it in it as it has a standard size (unlike minimig).
"Will boot times and load times etc be the same as orginal Amigahw or will it be accelerated (like UAE does)."
I *DON'T THINK* it is accelerated, but if you use WHDLoad games (which you probably will), then games load fast anyway.
"Will CD only games work, like OnEscapee,Napalm,T-Zer0 etc? (i did see that hdfiles are supported so i guess they will."
Well T-Zer0 uses CD audio tracks, so ideally there will be an option to mount .ISO as CD0. I don't see why this cannot be done to be honest.
"Which filesystems do they use?, which GB limit on bootable device partition etc?"
You can use any file system you want. If you use SFS you wont get a GB limit.
"ETA?, before summer or after?"
I know that the first batch is being shipped right now. The 2nd batch, should follow very soon. If I were you I'd contact MikeJ immediately and tell him you want one. The earlier you do that, the earlier you will get yours.
"Resellers ? video manual?"
No idea.
"Kickstarts? (will the os4.1upd4 kickstart's set which is included there work?)"
You have to supply whatever kickstart you want. I guess you'd put kickstart 3.1. As for that stuff you put in the bracket, that's something completely different which has nothing to do with classic Amiga/arcade fpga.