What is the best way to network with backpackers/ world travelers when searching for travel companions.?I ha?

Try these:
http://www.switchback.com/backpack/
http://www.worldbackpackers.net/forum/
Hope, it will help.

USA=AYHA Europe YHA. www.hihostel.com these are the original organizations that really work and will encourage you to travel and network. Avoid the alternative hostels, they are all about money and real estate and will strive to slow you down by offering what only amounts to substandard accommodation. AYHA and YHA properties are generally willed and are often stunning with professional staff and volunteers interested in promoting their areas. these are fabulous organizations. i have to this day good friends who i met as traveling companions and have gone successfully around the world using these networks. Good luck you will have a wonderful time