Travel Agency Commissions - Who Pays Them?

Hi,

I know there are a lot of "experts" on this site, as well as people who are in the biz. I had a question: do any airlines still pay travel agency commission on tickets sold? If so, how much? Does it vary by type of booking (ie, phone/website, etc.)? 
Obviously the internet has proved to be a major foe for travel agencies, who now cater to a much narrower audience. As far as I know, only those who are not internet savvy or distrusting of it, some business travel, and those interested in package tours/discounts go through travel agencies - I don't remember the last time I booked a flight at an agency! 
With this knowledge and the downturn in the economy, I thought most airlines stopped paying commission altogether or put caps on how much was paid per booking. I'd be interested to hear what people in here know...?

Please help. 

I didn't find the right solution from the Internet. 

References:- 
http://www.airliners.net/forum/viewtopic.php?t=229309
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Thanks!