Crikey, I can tell you typed that on a mobile device, it has no line breaks pretty much

If you find any bad apps in the App Time Machine, you can certainly report them by contacting them with the email on
their site!
Interactive notifications could be good, but really, there isn't much happening on the system in 3.1.3 in terms of inter-app communication either, so that is rather difficult to do. Calendar alerts maybe, SMS responses as well, but the third party apps support is practically nothing, especially seeing the apps don't run in the background or keep a thread open aside from mail and music and phone. Other than that, almost everything needs to actually load up the application to run anything, so it's no quicker than just opening the notification.
If we had the source code to Sara, we would probably cry because it is pretty buggy as-is. Perhaps someday it can be community driven, but I wouldn't get your hopes up.
Airdrop is different than just bluetooth, it is more complex as well. It cannot ever actually work with the native airdrop functionality on macs, so it is really useless to try and replicate whatever it actually does, as none of us are computer-side programmers, and even then, it would be ridiculously slow and only useful for the iPhone 3G really. I think iBlueNova is a paid application, so whited00r won't include it by default ever.
Backup system would be nice, we do have access to a couple of those on the source code side, but we have not had time to go through and see what can be used/fixed/upgraded. (we haven't even made whited00r 7 100% stable or complete yet...)
No way to make safari use another engine that I know of, unless we figure out a way to code one ourselves. Pretty sure the one from iOS 4 won't work on 3.1.3 simply because nothing else that requires code from other elements to work works on 3.1.3 if taken from a higher iOS version.
There may be ways to handle privacy on 3.1.3, but keep in mind it required a major overhaul and many new things from people who actually work at apple to get into place. Also, it required developers to change how they handled accessing the data slightly, to accommodate for the popups asking for permissions and the like (slightly, not much though if memory serves right).
Not sure what you are meaning with this bit:
Oh, there are hundreds of workable tweaks spread over myrepospace and others. Why not test them and put them in repodoor with that warning thingy. Yes the free ones although would it hurt if the developer of any tweak has seized work and paying for the tweak wont be an option. There must be my of such tweaks im sure.
