5th Cell (Drawn to Life, Lock's Quest, radness) just revealed their newest game to IGN. Like the last two, it's for the best platform evar (the DS). Also, similar to the previous works, it involves creating elements of the world. But this new game, Scribblenauts, might be the most ambitious.
To solve the puzzle-based levels in Scribblenauts, you write a noun. And then the named item appears. According to 5th Cell creative director Jeremiah Slaczka, there won't be any limit to what you can create. "People won't write half the things that exist in this game because they're so obscure, he told IGN." The team created a data-entry program to streamline the process of adding metadata to objects, and they've been scouring encyclopedias for months.
(okay, it's not really a textadv, it's all properties-based stuff. there's more info in this interview here.)