This past summer, our local coffee bean importer turned me on to Cascara Coffee Cherry Tea. I really enjoy it as iced tea, not so much as hot tea.
Since it's shredded dried coffee cherries, it is naturally sweet, but I add a tablespoon or two of honey per liter of warm tea, then chill it and drink over ice.

http://en.wikipedia.org/wiki/Coffee_cherry_tea

For a hot drink, I like Yerba Mate with honey.