I doubt that I'd be interested in most apps for the Kindle unless they were ebook related.
Apps I'd like to see would be;
Organizational; ordering, sorting, folders, tags, etc.
Informational; links to book lists, author homepages, etc.
System; ability to modify screen saver content and settings.
Content; ability to view other ebook formats.
That is really about it. Games, web apps, blah blah blah, not interested at all.