Business Week's annual Computer Buying Guide came out in the Nov. 4 issue, and it was launch time for Maven, "Your Personal Guide to Personal Computing" -- a Web site produced by BW and NSTL, the nation's leading computer testing lab (www.maven.businessweek.com). It's interactive and updated frequently. The Oct. 27 guests were Andy Froning, managing editor of NSTL (which also provided the ratings for the Buying Guide), and Geoff Lewis, senior editor of BW and one of the top editors of the guide.