Here's a new Amazon Sales Rank tracking website you might like to check out, along the lines of Titlez though aiming to be more friendly to the end user with more features and usability: NovelRank:
NovelRank is a completely free website for authors to track their Amazon Sales Rank on Amazon.com, Amazon.co.uk (United Kingdom), Amazon.ca (Canada), Amazon.fr (France), Amazon.de (Germany), and Amazon.co.jp (Japan). NovelRank is the best free resource for self-promoting authors to track their book's sales and Sales Rank on Amazon with charting, RSS feeds, and real-time data.
The creator of the site told me that it's still a work in progress - currently you track each book by going to its individual page referred to by Amazon ASIN - for example, http://www.novelrank.com/asin/0980711126. But in future "accounts will be enabled so that users can have a single page to track the status of multiple books as well as chart those books together" (and OpenID will be used so that you can use your current Google, Yahoo etc account). Well worth supporting with a donation, as it will certainly be a handy tool for self-publishers (and a good complement to Aaron Shepard's excellent Sales Rank Express).
