Are closed source applications "welcomed" in the Linux community?
I'm developing several closed source applications for Mac OS X and Windows. I'm considering adding Linux to the list of supported platforms.

These applications manage content on a web site and manage and monitor the servers that host the content. For each application, there is a web based XHTML front end as well as rich GUI front ends for Mac OS X, Windows, and smart phones (Apple's iPhone). Each application has a specific focus, such as managing text books, assignments, and records for high school students and teachers.

I'm not sure how well received closed source applications are, in general, by the Linux community. Are closed source applications "welcomed" in the Linux community?

I don't have any customers who are Linux users. Nevertheless, I don't want to miss out on a potential market. Provided, of course, that Linux is a potential market. 
Are closed source applications "welcomed" in the Linux community?
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I'm developing several closed source applications for Mac OS X and Windows. I'm considering adding Linux to the list of supported platforms.

These applications manage content on a web site and manage and monitor the servers that host the content. For each application, there is a web based XHTML front end as well as rich GUI front ends for Mac OS X, Windows, and smart phones (Apple's iPhone). Each application has a specific focus, such as managing text books, assignments, and records for high school students and teachers.

I'm not sure how well received closed source applications are, in general, by the Linux community. Are closed source applications "welcomed" in the Linux community?

I don't have any customers who are Linux users. Nevertheless, I don't want to miss out on a potential market. Provided, of course, that Linux is a potential market. 