Baker's yeast is used for baking to make dough rise. Brewer's yeast is "deactivated" (dead) and can't make dough rise. If you need it to rise, brewer's yeast won't work.
Consider using baking power, instead. Using baking power is a "quick bread" solution. You can use the following goole.com search to find recipes...
"quick bread" pizza "baking powder"
the quotes are important for quality of results. They tell google to look for the enclosed words as a phrase.
You can also just search on the phrase "quick bread" to find alternatives to pizza.
I found a reference to Neoapolitan Pizza that mentions using brewer's yeast (http://en.wikipedia.org/wiki/Pizza). However, it may not be accurate. It probably would not hurt to use brewer's yeast, it just won't do what baker's yeast does.
If you need more help, contact your local librarian.
Many library web sites have a link where you can chat online with a librarian 24 hours a day, 7 days a week!
The Cooks Thesaurus--Yeast...
Yeast supplement? Try baking bread instead
Chicago Sun-Times, May 9, 2001 by Sheldon Margen, M.D.