In response to Google Apps for Your Domain, Microsoft is also planning to release free web-based business software. The software will be ad-supported, but a paid, ad-free version will also be available. From the article: 'Revenue from software licenses for Office and the Windows operating system accounts for a bulk of Microsoft revenues. The challenge for Microsoft will be to make sure a free or, possibly, a subscription-supported version of Works won't hurt sales of its dominant Office software, which accounted for a quarter of the company's $44 billion in sales last year.' Would you choose an ad-supported online version of Microsoft Office over other free options like OpenOffice or Google Apps for Your Domain?
The short answer is "no", but it is a qualified "no" because there are odd ways of interpreting the question which could justify the answer "yes". Light is composed of photons so we could ask if the photon has mass. The answer is then definitely "no": The photon is a massless particle. According to theory it has energy and momentum but no mass and this is confirmed by experiment to within strict limits. Even before it was known that light is composed of photons it was known that light carries momentum and will exert a pressure on a surface. This is not evidence that it has mass since momentum can exist without mass. [ For details see the Physics FAQ article What is the mass of the photon? ]. Sometimes people like to say that the photon does have mass because a photon has energy E = hf where h is Planck's constant and f is the frequency of the photon. Energy, they say, is equivalent to mass according to Einstein's famous formula E = m
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