The IRS has announced (IR-2005-60) that it has made various improvements to it Tax Stats web site to include more statistical information on individuals, businesses, charities, and IRS operations:

The new design features an expanded home page that allows users to directly access the most frequently requested statistical information. Popular publications and products are featured prominently. Many more detailed offerings are available from easily accessed “all topics” pages. In addition to improving the structure of the site, the Statistics of Income Division (SOI) has added helpful information to each page so that users will better understand the sometimes complex products available on the site. Newly organized pages expand offerings to include more archival data, as well as new products. SOI is also introducing revised table formats — nearly all in Microsoft Excel format and offered with a free Excel Reader — and updated report formats, offered with a free Adobe Reader.