I've worked as a Notes administrator and have done customer support work for Notes end users. I've worked extensively with versions 3 through 4.6 -- but not the latest Notes version or the version for Linux.
I would not be concerned that Lotus is not shipping a Linux Notes client. If your end-users use an operating system that supports the Notes client (such as Windows), they should be able to communicate with the Notes server without any trouble-- regardless of the OS on the server. Lotus has been pretty good about making Notes cross platform.
I'm not sure what kind of applications the administrator wants to run -- but he might not even want to use the Notes client at all. From my experience, end users tend to get confused with all the configurations required for the Notes client. They might feel more comfortable using a web browser (more familiar interface) to connect to the Notes server in Domino mode.
In other words, the lack of a Notes client is a concern only if you are using Linux on the end users' computers. Even then, you might be better off, giving the users a web browser and letting them connect to your Notes server in Domino mode.
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I would not be concerned that Lotus is not shipping a Linux Notes client. If your end-users use an operating system that supports the Notes client (such as Windows), they should be able to communicate with the Notes server without any trouble-- regardless of the OS on the server. Lotus has been pretty good about making Notes cross platform.
I'm not sure what kind of applications the administrator wants to run -- but he might not even want to use the Notes client at all. From my experience, end users tend to get confused with all the configurations required for the Notes client. They might feel more comfortable using a web browser (more familiar interface) to connect to the Notes server in Domino mode.
In other words, the lack of a Notes client is a concern only if you are using Linux on the end users' computers. Even then, you might be better off, giving the users a web browser and letting them connect to your Notes server in Domino mode.