Preparing for the release of Mac OS X 10.4 \"Tiger,\" Apple this weekend continued to jazz its Web site with new material from the next-generation OS. The most recent additions are three lengthy technology preview PDFs that read like user manuals: Spotlight Technology Preview (1.3MB), Dashboard Technology Preview (1.4MB), and Windows Compatability Technical Preview (920KB). In related news, Amazon.com is once again accepting pre-orders for Mac OS X 10.4 \"Tiger\" for US$130 with a $35 mail-in rebate that brings the price down to US$95.