It's a real shame you can't detach the cable from the puck itself to swap it for a longer one. I think I'll pass, sadly.
On an unrelated note, I just went to look at buying a new MacBook (Air or Pro) and I'm shocked that even for the stock models there's a wait of minimum 2 weeks, up to 4 weeks through Apple.com. WTF.
I think lots of stuff on the website is coming from China, hence the delays.