Startup Australia

Link Building

Press Releases

Sending out press releases can help with high quality link building.
Press Release Guide

Directories

http://www.dmoz.org/
http://dir.yahoo.com/
http://info.vilesilencer.com/
http://www.clickfind.com.au/

Forums

http://www.cre8asiteforums.com/forums/
http://www.highrankings.com/forum/

Blogs

http://www.seomoz.org/blog - Good info.
http://searchengineland.com/ - Danny Sullivan.
http://www.seroundtable.com/ - Wrap Up
http://www.sphinn.com - Digg for SEO, PPC and online marketing..

Optimizers

http://optimizer.builtwith.com
http://www.google.com/websiteoptimizer