Funny, in my excitement I closed the browser window, and then realised that apart from checking and downloading the document (the pre-arrival services letter), I'd forgotten to check if anything else had changed in the gckey process page.
So I went back and logged in and ... the server is down! I know, they do this every tuesday in the wee hours in Canada, but can't help but be really hyper to know / see if anything else changed.
The problems of being always online. On the other hand, I'd have missed the window and not been able to see the letter at all if I'd checked 20 minutes later, and would have really freaked out.
(For info on process - got an email from CIC that said 'we sent you a message', check your gckey account. Logged into gckey and got the attachment - letter in pdf format - no problem).