here is some additional information about the open day. i try to be as non-redundant as possible towards what deadterra, daggeteo and johnyj contributed:

disclaimer: those are just my observations, i am no expert in hardware (which you will notice). i had ordered jupiters, but i wanted to check if kncminer is for real before i pay. so i went there to meet the guys. they have convinced me, but that is maybe not really worth anything. asic chip designing is orsoc´s routine job. so for them convincing a non-expert should not be hard.

the open day was held at a downtown stockholm office of orsoc. it was a regular working day, there were offices with people being busy. having a downtown office of this size (maybe 5/6 rooms with overall probably 200qm) did fit my expectations about orsoc from what i learned at the epic kncminer thread in this forum.
we were greeted by andreas kennemar, sam cole, marcus erlandson and michael unnebäck. they were friendly, confident, open and relaxed but serious. it was clearly not the first time that they met with customers about projects. erlandson and unnebäck stated that they both had decades of experience with custom hardware including asic and fpga. they gave us the impression that asic bitcoin mining is actually not "high-end" when it comes to asic engineering.

all four sat in front of the guests and answered almost all the questions asked. the 28nm asics were designed by them but will be produced in asia (china?), they will order the wafers as soon as payment is closed, so they know the quantity. they will order more than needed. the asic producer is waiting, they have pre-arranged it in a way that production can start immediately. the coding is done. the assembly of the asics onto the boards will be done in sweden, but is outsorced, same with putting the boards together. the devices will be tested individually but this takes only 10 minutes. they offer to test it in a way where it mines towards the buyers wallet (but i am not sure if i got that right) they will try to come up with a plug and play set up since they designed the hardware and did the software also.
water cooling will probably not happen since hosters are not happy with fluids that are conducting electricity. they don´t expect heating/cooling to be an issue. they rather put more chips on the board and calm down the load per chip. the design is prepared to handle/cool 1000 watt input. the fans they showed looked impressive (too bad, no pic, but i will try to find something similar) they have time buffers implemented and seem very confident about the time frame.

there are no batches. they will try to deliver as constantly as orders come in. they will order more chips than needed to have always enough chips. after the delivery of their devices has started they will monitor the dollar/hashrate ratio and if this ratio starts looking bad, they will improve their products. they stated that they are not expecting large profit in the beginning.

my impression was that they are professionals with lots of years of experience. it is not an idealistic start-up, but pro´s that like to show the bitcoin community how asic design is done in the real world.  

scam ? no way. risky ? yep.
i am more concerned about difficulty in october or bitcoin price than about kncminer being able to built what they have planned. will they deliver in time ? no one knows.