Is there a list of, or does someone know, the features that become unavailable when disconnected from the internet?
I can think of two;
syncing to another pc
home page updates
You can function fine with no internet if you can live without them for extended lengths of time
I'm sure a more knowledgeable person will also reply, but I don't believe there is anything that won't work except for syncing the settings and customizations and downloading of missing or updated resources. Once you sync once, you are good to go unless you buy new resources or want to backup your personalization and license.
Reporting typos also.
The others have nailed the features that don't work. Bob assured us in the beta process that you can use L4 without Internet for as long as you want. You just won't have the updates and syncing type things.
You have all the resources on your computer and can do anything you want there.
Chris
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