Apparently you're looking in the wrong places.
There are literally hundreds of excellent introductions to Linux on the web, in numerous languages, all with different focuses and styles. Those tutorials and guides and other like documentation are trivial to find for anyone with minimal web searching skills.
While few of them are specific to e-smith/SME the examples you used are all universal ones true for nearly any version of Linux and generally quite relevant to the popular Red Hat distribution e-smith/SME is built upon.
In my opinion it would be silly for the folks here on the e-smith support phorums nor for the fine folks at SME to reinvent the wheel and develop yet another "Welcome to Linux". Those other ones out there all do a better, more comprehensive, more diverse service supporting varying needs then could ever be (re)duplicated here.
Furthermore as e-smith/SME isn't a desktop OS distribution but a server one folks using it can be expected to be at least somewhat more technically literate and presumably more skilled at finding the resources most appropriate to their needs.
Rather what I would like to see would be a Phorum FAQ listing with the following notes: (*ALL IMHO*)
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1. Read the manual. Mitel has done a fine job of documenting their OS please don't waste everyone else's time & goodwill asking questions that are already covered in it.
2. Use the Search function before posting. It is very (very *very*) likely your question or answer has already been posted, oftentimes many times over. Do not forget to set your search to go back further then the default 30 days.
3. Don't ask when the next version of e-smith will be out. Mitel announces no schedules and promises nothing more then "when it is ready".
4. Don't post regarding beta versions of e-smith here. Rather contact Mitel directly at -@-.- and report any bugs or suspected bugs, they will follow up with you directly. Failure to do so may result in your bug not being fixed.
5. Don't report any suspected or reported-elsewhere security issues here. Rather contact Mitel directly at -@-.-.
6. Don't cross post. If you want to say something say it in one place once, not the same message in multiple places.
7. Post to the appropriate place: "General Discussion", "Experienced Users", "Wish List for future projects", and the "Developers Mailing List" all have different audiences and intentions, please respect them. You'll certainly get better responses if you do.
8. Make use of other resources. There are many more places to find information on general Linux or other desktop applications then here. For example this is not the appropriate place to ask general questions about MS Outlook unless it specifically involves how it interacts with an e-smith server. The same is true for other applications.
9. When posting a request for help be respectful of other folks time & interest. Use an informative subject line (not "Help!") and include appropriate information: e-smith version, did anything change beforehand, the steps leading up, what you've tried so far, the contents of any logs, anything non-standard about your setup, etc.
10. Clarity counts. Unclear / illegible / difficult to read messages get ignored by most folks. Before posting spell check your writing, consider having someone else proof read it, if you're not comfortable in English ask someone who is to look over your message first.
Finally, numerous resellers offer certified support for SME. If you're relying on it consider getting a support contract.
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Again, all my opinion, but I think such a primer on how to get support here would be most useful.
Certainly far more useful then trying to document Linux for newbies, or coming over from Windows, or Mac, or MacOS X, or interested in a firewall, or web serving, or as a music server, or as an email server, or workgroup collaboration server, or NT domain server, or....