[How To Update Btsync On Debian Vps?]

Short answer: stop btsync on your Linux machine (e.g. with the "kill" command), "wget" the new version for your platform, replace the "btsync" file and run again.

 

Do a search in the forum, someone posted a script to automatically update it. There is no point and click solution (yet).

[Iphoto Across 3 Macs?]

Hmm… Yosemite looks great but it could get pricey with 170GB of photos…

 

Not really:

 

 

Users can access 20 gigabytes of cloud storage for 99 cents per month, or 200 gigabytes for $3.99 per month. Plans up to 1 terabyte will be available.

 

When the iCloud photo library will be introduced, the prices of iCloud storage will fall (maybe even earlier). $3.99/Month for 200GB seems reasonable.

[Iphoto Across 3 Macs?]

I would be hesitant to try that, anyway: backup your iPhoto libraries first. I would at least assume conflicts, as soon as iPhoto is opened on 2 computers at the same time.

 

I would suggest you wait for http://www.apple.com/ios/ios8/photos/ and OS X Yosemite, which will bring you iCloud Foto Library. That is exactly what you are trying to achieve and it will include iOS devices as well.