Developers get to use iOS 6.1 beta right now. Don’t worry, it’s beta, and it’s just designed to help them spot any potential problems before release. What’s new? Let’s take a look.
- Changes to iCloud Setup: You will now need to confirm your Apple ID for FaceTime and iMessage. You can also confirm how you’d like people to reach you (phone number, email).
- Passbook Sample Card Update: UK updates for Sample Card, Mobie tickets now say “cinema tickets,” etc.
- Reset Advertising Identifier Now Works
- Voice Dial Only: It sets up Siri for voice dialing-only. Cult of Mac uses the example that if you say “Call Tom Morrison” the iPhone won’t mistake it for “Play Morrisey.” (Good one, guys.)
- New Cellular Data Option in iTunes: This lets you download songs over your cellular connection. Well, it toggles the option, actually.
Accessories & Apps: Beta Testers Wanted
iOS Firmware/IPSW Download Guide
Legacy iTunes Download Archive
App Store Top Charts
iPhone and Android Resale Value Charts
USA iPhone Carrier Plans Compared
Complete iPhone Jailbreaking Guide 
Complete iPhone Specification Matrix 
Personally, while I can see how it would benefit most iOS users, I REFUSE to install or run iCloud, as I don’t want my different devices to be crammed full of crap from different devices that aren’t designed for them. Apple hasn’t done a very good job at implementing these features.
I use iCloud for game syncing, contacts, calendar, photo stream. But I refuse to do backup, document sync. If you try to do some advance stuff it’s a mess.
The easiest way is to plug in with USB and sync via iTunes. Or if you don’t like iTunes, you could iatsnll the Dropbox app on both your mac and iPad and sync that way.