I just watched a game on the site and it was pretty good. It gave me the Rogers Sports Net feed straight with all the advertising. I suspect the frame rate is not quite good enough though, because when the action got fast there was some choppiness. The resolution was fine, certainly better than the aging TV set.
As far as the site being taken down, I was wondering about that since the place that this Mother Pucker Hockey site is linking to for the streaming video is in the Netherlands. They have a lot more on their site than just NHL games.
There's little info on the site, but I noticed that in their terms of service they don't claim any responsibility for copyright infringement, etc. I guess if they get taken down or how soon will depend on Netherlands copyright law.
As far as the NHL package, it seems a little pricey if they they aren't going to provide all the games of your favourite team. I'd be primarily wanting to watch the Canucks games and many of those will be blacked out. I'm not terribly interested in watching some random Tampa Bay vs. Columbus games.
I've spoken with a few people that run sites such as that, and apparently they think they are immune of all legal action since they aren't in the states / canada.
I would doubt they are immune, but it's probably vastly more complicated for a corporation to take an action against them in another country. It would also depend on the particulars of the laws in the country. The problem would be that the more successful the web site got, the more incentive the NHL or other copyright owners would have to take them down. My guess would be that this site is going to be temporary, so enjoy it while it's there. It might be they already have plans in place to move it to another country if challenged.