some that will grow emergent are any of the lindernia species (indica,rotundifolia), the bacopas (monierri, salzmani), hygrophilia lancea, and some persicarias, sao paulo in particular. there are also a few ludwigias that will grow nicely that way. and almost all cryptocoryne species will eventually break the water surface as they get larger. if you use natural wood, the wicking action will saturate the wood and you can grow many marginals on there like java fern (microsorum sp.) anubias, and bolbitis. that should get your research project started

and i know people don't really talk like that. i was surprised when i went to talladega for a race. i was really expecting all the redneck speak. boy, was i disappointed....LOL

edit: there are more variations of the genus i mentioned, i just gave examples of common ones