Sorry for the delay here folks. I was without internet due to the insane ice storm in the Midwest.
First and foremost, are these 4 users separate people? If so, then yes you need a family license. If it's only you using these 4 user accounts then a single license is fine. We license based on physical people, not user accounts or computers.
The $34.99 price is for a single user license, same price on the Mac App Store.
$48.99 price is for a family license, this is only available from our website. (Normally this is $69.99)
You'll want that option for any Macs:
http://www.agilebits.com/store/
Note that this is only for the Mac.
The $9.99 price is the sale price for the iOS application. The iOS application doesn't have a "family" pack option. This is actually Apple's system and we just have to work within it. They link purchases to an AppleID. So, if you have 4 iOS devices, each with separate AppleIDs then you need 4 separate apps. There's just no way around this other than using the same AppleID on each device (the way I suggest doing it actually).
Let me know if that helps!
You can purchase a 1Password 4 license and let me know via PM and I'll make sure to issue you a 1Password 3 license. This will let you use 1Password 3 on the Snow Leopard computer.
This will sync fine to 1Password 4 for iOS via Dropbox (no wifi sync or iCloud sync)
If you have further questions please PM me so we can discuss details
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You would probably be best purchasing 1Password 4 from our website, the Mac+Windows bundle.
This will get you a single user license of 1Password 4 for Mac, and a single user license for 1Password for Windows for $48.99.
This also includes a free upgrade to 1Password 4 for Windows, currently in private beta.
Then for your iPhone and iPad, you can purchase for $9.99 from the iOS App Store on your iOS devices.
So, total would be $48.00 + $9.99 + Tax if applicable = $57.99 + Tax
If you're going to be syncing all of these together, you'll probably want to use Dropbox syncing. iCloud isn't compatible with Windows (Apple doesn't expose 3rd party app data to applications on Windows).
Let me know if you have any questions!