You can always try this:
http://www.downforeveryoneorjustme.com/flyertalk.com
I was going to suggest trying to access FT via a proxy/cache like
http://www.flyertalk.com.nyud.net, but interestingly, trying to do so, I get the same error as you when doing that:
Code:
Error: 504 Gateway Time-out
www.flyertalk.com: Resource temporarily unavailable
Server CoralWebPrx/0.1.20 (See http://coralcdn.org/) at 138.15.10.56:8080
That last line indicates an error on the proxy server (CoralCDN). Does your gateway timeout page give an indication of the gateway that is having trouble accessing FT?