Smallbusinesscomputing.com has a great article about Linux in small businesses.

From the article:

'While Linux has become more accepted in the business environment, many still view it as geekware. Those companies look at Microsoft the way companies used to look at IBM ? as the safe choice.'

He points out that Linux has improved in many areas over the past few years. First and foremost, he says, in performance and reliability. 'It usually just works, something a small business appreciates,' says Nickolett. 'Software installation and patch management have improved dramatically and graphical desktop tools are continually evolving.'

He also notes that a wide range of products and applications are now supported on Linux. Almost any small-to-medium-size business, he believes, could find what they need on Linux.
I love how he points out that Microsoft and IBM have similarities. At one time I don't think anyone expected IBM's chokehold on the computer market to be cracked, but then came 'IBM Compatible' and then later I remember when the media was saying 'IBM is the least compatible' See, there is still hope!