I read this tread and was kind of surprised that there is no regulation at all on wingloading in the US. Here in Sweden we have quite hard rules on this subject... I feel that the rules are a bit too restrictive, but they clearly cuts down on accidents on newbies.
I attached the swedish weight/size regulation, if anyone is interested...
The numbers in bold are the recommended size, the numbers in parenthesis are the absolute smallest sized main canopy you are allowed to use. The numbers on the left are total jumps after a completed education.
The weights are in kilograms, but I entered the corresponding lbs weighs in blue text, so you non-metric people can read it (I hope I converted it correctly)
And, excuse my english, it's not my primary language :)