It would be a good idea to make it possible to make the links viewable only by people in certain user roles.

In my case it would be perfect because I am making a site that there are going to be many pages, each requiring a different role to access. This would mean the user may be subscribed to multile pages at once, making it extremely useful to be able to see links to pages they are subscribed to only.

is there already a solution for this?

So are you suggesting that I make a links module for each link to a page and set each modules visibility to the proper role? That could work, although being able to set the visibilty for each link within a single module would be much better.