sure, that is definitely doable and you can do it with stock code by hijaacking a custom island (that will never display).
you can set that custom island to run the query(s) on an interval of your choosing (say every 60 mins for example), update with sql like "REPLACE INTO bla bla bla" from a nice ordered table, much like you have above..
you can even edit that table as time goes by and you add more groups and forum related.
