Pontoon style boats are huge over here, there are literally a hundred manufactures now. Some of the more popular brands are:
One way to have a good look at these boats is to go to www.trademe.co.nz
and select the boats section and search for the word "pontoon" and you'll come up with a heap of matches.
Most people buy them for the sea-keeping abilities and the fact most are unsinkable. I've just had 4 days trout fishing on my boat with 4 guys - and we had 4 of us fishing from the one side with hardly a lean, it was fabulous.
I have a great time showing mates when they come over what the Mac can handle, I give them a hammer and tell them to take a swing at the hull - they do and the hammer just glances off without a scratch - quite good fun!!!
One of the things I love about the poly material is you can just screw any fittings in with self tappers for a super strong hold - if you need to remove the fitting, just get a soldering iron and using a drilling offcut melt it into the hole - smooth off - and finish with a craft knife and heat gun to shine up.... you will not be able to tell there was ever a hole there.
Heres a few pics of the previous one I owned the mac 3.6 model - a fantastic wee boat for fishing, again you can perch two guys on the side without creating a fuss and stand and fish all day long.