Tonga visas

I'm going to Tonga with a group of friends in mid-July 2009. Some of my friends will need visas to enter Tonga but I can't figure out where they can apply for visas.

1. Is it true that citizens of Australia, Canada, New Zealand, Portugal, Singapore, UK & USA (and others) do NOT require visas to enter Tonga?

2. If my friends require a visa where (email? website?) can I apply for one?

I would really appreciate your advice. Thanks!!

You get a 30 day visitor visa on arrival with an AUS,US,NZ,EU passport there are over 50 countries that do not need a visa.

Check this link for full information

http://www.tongaairports.com/visas.html

If you need any more info feel free to PM

thanks