Statistics Canada has posted some info on this under Important Updates:
This site is temporarily experiencing traffic that far exceeds capacity.Please note that the online questionnaire operates beyond May 16. We encourage you to try again before May 23rd. This will satisfy your obligation to complete and return your Census questionnaire.
Note that the census form has now been made available to Linux users as well.
Note: Important Updates
Stumble It!
<<a href="http://www.itbusiness.ca/it/client/en/home/News.asp?id=39446>">http://www.itbusiness.ca/it/client/en/home/News.asp?id=39446></a>; <br />
<br />
Wherein, this from our pal, Anil: <br />
<br />
"Nobody has done an exercise like this in Canada where you <br />
open up the Web to everybody (to fill out the census <br />
online)," he said. "We didn't have any kind of a track <br />
record, any kind of experience as to how many people could <br />
log on at any moment." <br />
<br />
snip <br />
<br />
"We knew yesterday was going to be challenging no matter <br />
what," he admitted. "We had no idea, no precedent of what <br />
kind of load we would have." <br />
<br />
e.p.1