I might be getting old and repeating myself, but there is some inspiring stuff:
Simplicity, an experimental research program at the MIT Media Lab, focused on developing technologies for design—designs that are simpler to understand, easier to use, and, ultimately, more enjoyable.
MIT prof. John Maeda’s blog, some nice ecards (oh my, ‘ecards’ does sound soooo 98!), and also, books by John Maeda.