Yeah, the only predictable thing about this launch was that the Lego website would crash and collapse under demand, as it has with every major release in the last decade.
There has been a fairly scathing backlash from the 'AFOL community' around this launch. Ignoring the fact that Lego didn't limit the purchases to 1 per household online, but rather 3, then the fact their systems totally lost it, and the fact they simply didn't have the stock to begin with has lead to many angry people.
The good news is stock will return, although when seems to be a bit of a mystery, so anyone wanting one will get one... Eventually.
But if Lego fail to solve their website issues and general stock management around major releases after this, which is off the back of the Saturn V, debacle, then they are going to continue to get bad press over their ecommerce systems, and rightly so.
Although the counter argument is simply. Lego simply say "Demand four our great product is so high it took down our robust site and sold out globally in a day... How good are we..."
Personally I hate that these sets are selling on evilbay for 1000's now, and not just the signed sets, regular ones are going for a pretty song as well - that sucks.
On that front my wife saw how much a signed one went for last night (£5,600) and enquirer if I would be selling mine... I declined, but I sensed that was the wrong answer