Apple Can Extract Texts, Photos, Contacts From Locked iPhones
"iMessage" is a message transport. The app is "Messages". The document from Apple specifically says "SMS": it does not mention either Messages or iMessage. While it's possible that Apple leaves iMessages unencrypted on the device, it would be surprising given how much trouble they go through to protect then in transit. So while this document doesn't explicitly say iMessages are safe, it also doesn't say they're vulnerable.
Ask Slashdot: Laptop + DSLR Backpacks
It's big enough to carry everything you've mentioned, but no bigger than necessary. It comfortably distributes the weight when fully loaded, and is unbelievably durable. I've used mine on a daily basis for four years, including several cross-country and international trips, and it still looks new. Worth every penny. Highly recommended.
Bluetooth Headset Roundup
i've been a bluespoon user for years- first the AX and now the AX2. while they've worked great with all my Nokia phones, i just switched to an LG CU320 and if i use the bluespoon with it, people on the other end experience intolerable echo. so, YMMV.