Good summary, Aussie2B. I would agree with your assessment.
But don't just take my word for it. As each of us are laymen, let's hear from some real lawyers!
- Look and Feel in Computer Software | ComputerLaw Group, LLP
- Practical Law 101 For Indie Developers: Not Scary Edition
- Legal Battle Royale: Not Boring Edition
- Practical IP Law for Indie Developers 301: Plain Scary Edition
I would say that Apple v. Microsoft, 779 F. and Data East USA. Inc. v. Epyx Inc., 862 F.2d 204 (9th Cir. 1988) are of particular interest.