Billing itself as the "first social bookmarking system optimized for mobile phone users," PhoneFavs lets you maintain a list of bookmarks that's accessible from any browser-equipped mobile device -- cell phone, smartphone, iPhone, etc.
PhoneFavs works not unlike a mobile version of del.icio.us, the popular Web-based bookmark manager. In fact, you can import bookmarks from that service, along with Internet Explorer and Firefox. You can also add a bookmarklet to either of those desktop browsers, then add sites to your PhoneFavs account with just a few clicks. When you load PhoneFavs on your mobile device, you can access your favorites as well as a directory of mobile-friendly links.
PhoneFavs is a free service -- and a mighty useful one at that.