I have more than 500 favorites in Powermarks. It is a Favorites-Manager, very nice replacement for Browser Favorites. It is compatible with IE, Netscape and (soon) FireFox. Bookmarks can also be synchronised between multiple PCs over the Internet.
Bookmarks are stored in a simple htm-file, besides, different export-formats are offered. So it is not really difficult to create a convertor to MyInfo. I will really appretiate it, because after that I will not need Powermarks any more ;)