Huckabuck (www.huckabuck.com) is now offering a web based pageranking tool that tracks your ranking for search terms across the major search engines (Google, Yahoo, MSN, del.icio.us). It assigns you a pageshare % using these results and allows you to see where your competitors rank relative to your own site. Currently the service is beta mode so the service is gratis. Also includes a nice scheduling and alerts feature that notifies you by email if your rank/pageshare changes.