Ok, you've sold me on it. I even used my precious mobile data to download it. Set the sleep thingy and enabled it via the widget. I hope that was all I needed. Cheers.
Um... well, you can use the menu to select the notifications you want to add or remove, and whether you want icons to show what the notifications are or simply the default coloured squares. I have notifications enabled for Gmail, email, sms, missed calls and voicemail but there are heaps more by app if you want to enable them including RSS and such. Your call really. But if you're happy with just Gmail, then you prolly want to disable the missed calls and such that are also the defaults.
What a very long paragraph. :D