This has been mentioned elsewhere in the past but the iOS support for the standard HTML syntax for 'mailto:' appears to have changed.
When you code.....
<a href="mailto:joe.bloggs@gmail.com?subject=Application%20Feedback&cc=another.friend@gmail.com">Send us some feedback</a>
On the device, clicking on the link does nothing. However a long-click pops up a dialog that offers the user a Newmail/Send Message/Add to contacts choice.
If you click the New Mail option the mail client pops up with the correct address populated but none of the other Subject or CC parameters that are normally passed to the client.
Anybody had better luck with this?