A few of my favorite links:

WorldConnect from Rootsweb
This is by far and away the easiest place to find information. Of course, easy is not always best...

This site is good for finding gravesites

Seriously, guys, Facebook is great for genealogy. It's amazing how many of my relatives I've found there.

Family-specific links:

Yahoo Von Nida Group
The Von Nida family forum on yahoo Groups is a good place for von Nida information

Jack Nida's site
Jack Nida (R. J. Nida) is the author of a tome on the Von Nida / Vonada / Nida family

Adam Barner was the patriot ancestor of my fiance, Megan Brooks

Links local to central Pennsylvania:

Obituaries from central PA papers: CDT Altoona Mirror Lock Haven Express

Centre County Genealogy
This site has a bunch of Centre County-related links, message boards, etc. I highly recommend the Pennsylvania Room in Bellefonte while I'm at this.

Penns Valley Genealogy
This site is specifically for Penns Valley, in eastern Centre County. The physical location in Aaronsburg, PA is much more useful than the site!