GMail Labs introduces a new feature keeping the usual Google moto in mind “Simple and Fast”. You can now turn the tasks on and off and can manage them from your GMail’s navigation bar. No need to turn the feature or or off from the labs anymore. GMail Labs say
We’ve been continually improving Tasks since it first launched in Labs. We believe simple and fast is best, so we’ve been working to make Tasks more responsive and get basic interactions working better: we’ve added mobile and gadget views, made improvements to task editing and management, launched in more languages, and integrated with Google Calendar. We’ve also added a printable view for those people compelled to do things away from their computers or mobile devices.
Read more about Tasks at GMail Labs’ Blog