Welcome. I'll try to address some of your questions.
1. A drop shouldn't void your warranty. But obviously, being dishonest about it is fraud: "My screen is cracked for no reason!", etc.
2. Dunno. Do you know anyone who can sew?
3. I think you should be able find 2GB for $20. Your usage sounds light, though, so 1GB might be sufficient. I assume that you don't need 200 tabs open in your browser
4. I think I paid about $46 for my slim USB burner. I don't use it frequently, but it's quite useful at times.
5. Bluetooth is like wireless USB. It enables a wide variety of devices. Mice, headphones/headsets, file transfer to
BT-enabled cellphones, Wii remotes as game controllers, etc.
Yes, you can get wireless USB devices, but they generally each need a separate reciever. A
BT receiver takes up just one USB port, or none if it's builtin.
That said,
BT devices tend to be overpriced compared to wireless USB, and limited in selection. I have a pair of
BT mice, and a
BT headset/headphones. I'd like a
BT keyboard, but I've never seen a decent one for a reasonable price.
I hope you enjoy your Mini.