Rails - Nov 2006 - ActiveRecord for a single instance?

I''m looking for a better way of storing user options (what stylesheet
to use, and stuff like that) for my rails app. The data I need to
store is very simple and there will only ever be one options instance
per user and there will probably never be more than one user.

I feel that putting up an ActiveRecord model for this would be
overkill. But on the other hand I wan''t something that will survive
sessions. What''s the middle ground in Rails persistence?

-- 
Alex Polite