Links of Interest
http://www.asterisk.org/ - Home page for the Asterisk Project.
http://www.digium.com/ - Asterisk Products and Services.
http://www.freepbx.org - Asterisk Configuration Graphical User Interface
http://www.exabar.com/ - VoIP and IP PBX Phone System Solutions
http://www.xelatec.com/ - Asterisk Based VoIP and RoIP Products and Services.
http://www.voip-info.org/ - A great Asterisk and VoIP reference.
http://www.atlaug.com - The Atlanta Asterisk Users Group.
Asterisk: The Future of Telephony (2nd ed.) This book is the mother of all Asterisk resources! It's a 15MB .pdf file so make sure you have Adobe Acrobat Reader installed and give it some time to download.
http://whatismyipaddress.com/ - Where are you on the Information Super Highway?
http://speakeasy.net/ - IP Bandwidth speed tester.
http://www.tightvnc.com/ - A must have for collaborative problem solving.
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html - Also must have so you can log into your Linux/Asterisk server from your Windows machine.