I did create it. Yes it would be nice to have more people join. We are working on it!
@RobertM
Would love to see Sydney updates if you can provide them. I was actually born nearby (Wollongong) many years ago!
No way I go down there almost every weekend, its beautiful part of the world with beaches on one side and national parks on the other.
I am the head editor of buildsydney.com so I can speak to the owner & see if you can potentially syndicate some information onto your site that way you could fill up the sydney section much more quickly. There are also several city based sites (brisbanedevelopment.com & urban.melbourne) which track developments in their respective cities just like you do with the Toronto based site which is amazingly detailed.
I think it will be very hard to compete with skyscrapercity without having content & active users. This is a much better platform, all you need is a big drawcard to bring the users here! If you need any help feel free to ask & goodluck with the site. I will do my bit to keep the Sydney section of these forums active.