If you haven't already heard the latest of Apple's Legal Wars, Apple has recently filed a patent suit against HTC, the makers of the Hero, Desire and Legend. The suit alleges that HTC have infringed on twenty Apple patents that are all related to the iPhone, it's User Interface, Architecture and Hardware.
While there has been discussion about the fact that if the court were to side with Apple could demand that HTC kill the phone, or at least some of its functionality, and apparently they easily could do this. Although, this is very unlikely.
“We can sit by and watch competitors steal our patented inventions, or we can do something about it. We’ve decided to do something about it … We think competition is healthy, but competitors should create their own original technology, not steal ours” Steve Jobs, CEO, Apple
EDIT: And Google WOULD want to support HTC. If Jobs and the fruity crew are going after the HTC UI and OS at all - they're also laying groundwork to do the same for Google's Nexus One, which is ALSO made by HTC and runs the Andriod OS.
Official Apple Page About Suing HTC