ASPX/JS Site Map Generator

Looking for an integrated sitemap generation solution for an ecom website. The site has about 1100 pages of dynamic content for its products and categories. We want to add a solution that regenerates our sitemaps in their variety of forms. Not only the new [login to view URL] format agreed to by Google, Yahoo and MSN - but also their existing RSS, XML, flatfile forms and those of other search engines. This should be no more than a few hours work for someone who has done sitemaps before. The code exists all over the web and I'm simply looking for someone to do the work of changing my existing ASPX solution from a Google-only design into a multiple sitemap provider solution. The existing code is very concise and easy to understand, and illustrates everything required to pull our product information. It's simply enhancing this aspx file to create the different formats and feeds. Bidders on this project should provide the following: 1) List of sitemap formats that will be generated. 2) Method for indexing non-dynamic pages as well as those that can be pulled from the database. 3) Proposed solution language. Extend the current aspx/vbs page or a new solution based on javascript or windows shell scripting? 4) License information for any open-source code that will be used.