I enabled Google Cloud-Print but what can I do with it now on my phone? According to the page http://www.google.com/support/cloudprint/, I should now be able to print gmail mails : 

Answer taken from this page:

How do I print to my Google Cloud Printer?

+ The steps you take to print will vary from application to application.

- On Chrome notebooks, ...

- On Gmail and Google Docs for mobile, click the menu in the top right corner and select Print.

Notice the click the menu in the top right corner and select Print.

I don't see such a button or looking at the wrong place.

UPDATE - ADDITION

Because I don't think this should qualify as a new question: I want to add this to my original: what native Android applications support Google Cloud-Print ?
You will not find this setting in Android's Gmail app, but on the Gmail mobile site (accessed via Browser) it's here: