Partner With CDN: Saving IP Transit Bandwidth, and Faster Access

Many IP transit now have their own CDN, but it is likely not a free service.  Traditional CDN, like Akamai, are open for ISP to partner with them.
Partnering with CDN give benefits.  Because it's locally placed at your data center, it can give benefits.  The benefits are:
1.  Saving international IP Transit bandwidth
2.  Faster access

Akamai has program called Akamai Accelerated Partner Program for ISP.  It is for ISP that want to place Akamai CDN server at their data center.  Akamai has many customer from content provider to software company, like Microsoft, Adobe, and many.  One that's looks as a benefit is your Windows Update will be direct to your local data center, because Windows Update are hosted at Akamai server.
I have experience when apply for Akamai Accelerated Partner Program.  They looks my ISP AS Number, and they say, our traffic to Akamai content is about 30 Mbps average a day.  After they evaluate, and agree, they ask us to provide environment for their servers, like rack, gigabit port, and setup BGP session with them.
Akamai work based on DNS and IP address.  Akamai server client based on DNS request, and reply resolved address with nearest Akamai server.
Until now, I have no reference about others CDN that have partner program like Akamai.  It's best for your ISP to partner with Akamai.  It will saving your international IP Tansit bandwidth, and give faster internet access.  And the best thing, it's free at all.