Great article but you forgot to mention the iPhone Manager DiskAid for PC and Mac http://www.digidna.net/diskaid. With this tool you can backups your apps with their settings and contents on your computer to free space on your device. And then you can later restore the ipa files, all data and settings are also…

DiskAid does the same for free and a lot more: http://www.digidna.net/diskaid