I'm using Tangible's editor and (no offense guys) it sucks. Its one painful step above notepad. But its (afaik) the only game in town.

Does anybody have any tips/tricks on creating T4 templates in a non-painful way?

For instance, I'm thinking about creating a T4 Template that essentially turns a class defined in a solution into a template generator. DTE, look for code that is marked with this or that attribute, run this or that method, and drop the results into a file. At least I'd get legit intellisense out of the deal...