Offers some nice subscription management functionality, but:
- Subscription form generation is completely reliant upon JavaScript support, with no graceful degradation for script-less/disabled browsers, resulting in missing subscription forms!
- Form 'label' elements don't use the 'for' attribute - using 'for' aids accessibility and usability generally.
- Inelegant subscription form mark-up - e.g. submit button is difficult, though not impossible, to target with CSS in IE6 (yes, some of us still have to support that piece of crap).
http://wordpress.org/extend/plugins/g-lock-double-opt-in-manager/