They did invent some interesting infrastructure and dev-level stuff, which they've open-sourced.
Sure, the iPhone is a mobile phone but it's no way any more similar to what Motorola invented than how similar Motorola's mobile phone is to the original landline phone.
Instead, they're suing over ticky-tack nonsense that other people did before like:
- "slide-to-unlock" (Neonode N1m)
- clicking to call phone numbers they detect in text messages and email (Palm Treo among many, many examples - especially if you look at analogous desktop functionality like recognizing URLs in email that makes the concept obvious)
- tablets that are black rectangles with rounded corners (Knight-Ridder concept tablet from 1994, the movie version of 2001, ...)
Perhaps if more people were aware of exactly what Apple was actually suing over they'd be less supportive.
Facebook didn't invent anything.
In reality Apple should be the real bad guy in whole patent issue.