I can't see if this has been mentioned before, but I've noticed that Gamezebo have created a Fish Tycoon Google Gadget so you can play FT from your iGoogle homepage.

See here: http://www.google.com/ig/directory?root=.../fishtycoon.xml

I'm not sure if this works if you don't have an iGoogle homepage, but you can sign up for one by clicking on the "iGoogle" link from the Google main page at http://www.google.com