After working with Ext for some time I tought it would be time to start writing some extentions.

Ext.ux.PasswordMeter calculates the strength of a password, shows a nice graph and can be used in any form.

Code and example can be found here.

If you guys have suggestions or comments please let me know.

Hopefully it can be usefull for someone

Compare with other fields in the form (configuration option)

Fix IE layout inconsistency
I improved the algorithm and it now works like expected
Set meter to 0 if the password field is empty