For the RPer less-than educated in Pernese culture and quirks, here's a bunch of links to educate yourself with!

All the Plants of Pern - Perfect when you need information on Pernese herbs and plants. I use this all the time for Hali.

Dragon Sizes - Comparison of dragon sizes. It's pretty self-explanatory.

Pernese Sayings, Curses, and Etc - I also use this one all the time. It's full of phrases and what they mean.

Full Character Sheet - Aren't you glad our character sheets aren't required to be this long? Just for fun, if you want to fill it out.

Guide to Wingleading - Handy, although....well, dunno how much we'll be fighting thread here in Southern unless you want to. XD

Wikipedia Pern - Lots of information on Pern. Just search for whatever you need! It's Wikipedia, so of course it has loads and loads of information.

Pern Wiki - I personally think it's rather lacking in information, but some of it is handy.