Woke up in Bangkok, had a bit of trouble finding the place where we were supposed to be picked up for the next bus (arrived there at 6:50 while we were supposed to be there at 6:30) and spent an hour wondering whether we were still on time. Just as we started to consider whether we should book a place to sleep for the night, we got picked up for another bus which would take us to the Cambodian border.
After getting our visa we were told to follow a Cambodian guy, who'd take us to the other side and who first told us to get lots of Thai Baht out (which I failed to do) and then on the other side told us that we couldn't pay in Thai Baht and that we'd have to change all the Baht to Riel (the Cambodian currency) because all banks would be closed in Siem Reap for the weekend.. Fortunately we had been warned that nobody uses riel for anything so we skipped that part of the scam as well.
After a long, hot wait at the border, we got to spend 7 hours driving the last 150 kms. Eventually made it, booked into the hotel and found out that:"Yes, the non-existing ATMs in Siem Reap do actually hand out US-dollars."