is it really the same PCB as Lancelot?
yes, it is
is ngzhang's last firmware for Lancelot working on them? not just in theory, but if it was tested.
We tried the v42 firmware but apart from showing faster speeds it is producing less blocks. For this reason we ship them with the 200Mhz firmware
wasn't the PSU included in the 350$ yesterday?
Yes it was but after a chat with DHL it turned out that we need to pay more for DHL than we actually pay for the PSU. For this reason we've removed it. We did not lower the price as our manufacturing cost increased because our FPGA supplier ran out of IC and we had to buy the rest of the FPGAs from another company
is the "In stock" sign still valid or we will have to wait for the units few weeks?
You will need to wait until the week 6-10 May.