Welcome to MobileRead, fishcube!
For a general once over on the 500 (it's just "Reader" by the by, we don't really know what that
thing is, but it's not an "e"
), a good place to start is
here and
here.
From there, you'll want to have a look at the discussion in this forum.
As for the 505, all we've really got at the moment is rumors, but
here are the best of them.
