I started out my homebrew odyssey making mead and have now branched out into wine; some of the wines I've made would really be enhanced by carbonation, but I had no equipment and not a clue how to do it. Well, I did a search and found this....hope it helps anyone else in my position. I haven't tried it yet, will in a week or so.
http://www.instructables.com/id/Carbonating:-The-Cheap-and-Easy-Way/#step1
http://www.instructables.com/id/Carbonating:-The-Cheap-and-Easy-Way/#step1