And here's another little example: I've only recently started a Facebook Page for this site, SEO Tips Australia. I just gained a new fan. I looked at his likes and saw that he was liking lots of pages with the words "SEO" and "Australia" in the title. So he must have found mine by searches for those keywords. That's actually a very popular search on Google, so it makes sense that someone would be searching within Facebook for it also.
So, there's confirmation that it's worth using Google's free keyword tool to get some ideas about the best keywords to target on Facebook. Then you should put those in the name of your Page. And you should also be mindful of keywords when writing updates, because people do search for them in public posts. Sure, the FB search engine is pretty unsophisticated right now. But it's sure to improve over time. And people will use it more and more to find pages to connect with. So those SEO principles are definitely worth keeping in mind whenever you are using the site.