Zagg's foray into a folio-style keyboard case for the iPad 2, the Zaggfolio, succeeds when it's in keyboard mode. However, it's not ideal as a pure case.
An iPad-like device with a physical keyboard would be really cool. And despite Apple's willingness to dump old technologies, I don't think it's a pipe dream.
What's holding back an iPad with a keyboard from replacing my laptop? The answer's simple, and it's utterly necessary.