Apple is slowly pulling ahead of PC manufacturing giant Dell in terms of company value.While Dell and other Windows box manufacturers deal with the impact of the delay of Microsoft\u2019s forthcoming Vista operating system, Apple\u2019s new range of XP-friendly Intel-powered Macs (with Boot Camp) continues to attract attention.To boost attention even further, Apple has launched a new campaign to urge Windows users to "go Mac."Meanwhile, the two companies\u2019 respective stock prices (US$71.62 a share for Apple and $25.43 for Dell) reveal that Apple is\u2014at least for now\u2014the more valuable company. Dell\u2019s market value is $59 billion, while Apple right now is worth $60 billion.While the value of shares can fall as well as rise, the figures confirm the value of Apple\u2019s slowly growing market share.There\u2019s a background to this rivalry. On\u00a0Oct. 6, 1997, Dell CEO Michael Dell urged Steve Jobs (who had just returned to Apple as its interim CEO) to close Apple and to give its shareholders their money back.This drew an aggressive response from Jobs, who warned Dell that Apple was "coming after you."Apple drew ahead of Dell in market value for the first time on Jan. 13, 2006. While the battle isn\u2019t yet cut and dried, this news does mean that Apple isn\u2019t a niche player any more.-Macworld staff, Macworld.co.ukCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.