I applied for a job with National Geographic yesterday. This morning I applied to Expedia, and later I'm going to apply to the Travel Channel.
Here are the job links to a few of the big wigs.
National Geographic
Travel Channel
Virgin Atlantic
Outside Magazine
Rough Guides
Expedia.com
I visited a site at: http://www.982press.4t.com. They have magazine guidelines and pay rate info avail to writers. Great information!