Welcome to the forum, Byme.
Not sure what type of forge interests you. After study and trying a few styles at other shops. I'm assembling materials to build a side draft forge, probably with a Super Sucker style hood like this
http://www.anvilfire.com/21centbs/planfile/ and with the balance lined with firebrick to not waste fuel heating an entire metal forge assembly every time it's used. Side draft seems to provide the most versatility for my plans, including fuel options & economy, operating range and fire access. A small gas forge is simple to do as well, be portable and only use very little space in your shop.
I'm also quite intrigued with the very basic foundry work done long ago in Benin (SW coat of Africa) that produced exquisite works of art and the crucible steel episode of the USA Public Broadcasting Network (PBS.org) show NOVA. Both are sources of good info that might be inspirational to your plans as well.