With more companies adopting security practices such as web proxies, blocking broad Internet access, removing administrator privileges to user desktops & laptops, browser security receives less of an emphasis that feature functionality. In general, corporate IT staff are not tasked by their management to make sure a user's browser works well with Yahoo! or MSN Groups or even Slashdot. They are tasked to ensure the user's browser works with the myriad of applications that the managers expect the users to use throughout his/her work day.

When faced with internal corporate applications, there are still some that do not work well with Firefox. Through no fault of the browser, the corporate web application could be designed specifically with IE in mind and, hence, doesn't work as well with Firefox. In order for Firefox to obtain a larger marketplace within corporate infrastructures, there needs to be significant uptake by the companies designing internal corporate web applications.

I should clarify my opinion on this (and it's just my opinion). The virtualization marketspace is large and there are many areas to grow into. Parallels is targetting certain users and use cases. VMware is targetting certain users and use cases. Xen is targetting some. QEMU. Virtual Server. They all have users and are being used for different things. I think Parallels is playing things smart by getting into the Mac market early and targetting the users there with a low priced product, and that may secure a position for them there. But it's not at a point where I feel VMware has to fear it. Keep the company in mind, yes. But "VMware fears Parallels in a big way" is a bold statement to make :)

(My opinion is my own, and not necessarily that of VMware.)