My latest Web2.0 article at developerWorks has been published. You can read it here:

Using Ajax to add document preview functionality to IBM Lotus Domino

Please post any questions or suggestions in this thread.

It is bundled in an e-kit which can be found at the top under "Top story" here:

http://www.ibm.com/developerworks/lotus

There is even an interview with my old idol Tim Berners-Lee in the e-kit!

Congrats to the article, 

I have never used the max-age http header before.

Thanks!

max-age is my absolute favorite. Easy to use - no strange date formats as in the expires header.