I would post a link, but it's a competitor site. However, if you Google "plaintain nutrition," you will get several hits.
I don't know if there's a limit, but I have about 450 foods in my custom list and no glitches yet.
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days