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They should be backed up automatically to your Google account if you opt for that.

If you've had enough of manually entering your apn's Kie you can use this app
https://play.google.com/store/apps/details?id=com.riteshsahu.APNBackupRestore&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5yaXRlc2hzYWh1LkFQTkJhY2t1cFJlc3RvcmUiXQ..
You will have to use titanium backup to convert it to a system app to work on ics.
That's as good as I'm gonna get! Of course I need to download titanium first so I'll have to be in a wifi area but at least I don't need to manually enter it!If there is a more advanced way of saving network passwords so they survive a full-wipe, I'm interested in knowing as well.
Of course I need to download titanium first

As Shotgun84 stated, they're backed up to the Google cloud if you use the Settings/Privacy/Backup & restore option.
AsShotgun84pupkact stated, they're backed up to the Google cloud if you use the Settings/Privacy/Backup & restore option.
Open TiBu, hit Menu/More/Create "update.zip"... Problem solved.![]()

I'm assuming it also saves the licence key there? Else I'd have to 'download' / 'install' it from the play store anyway.I'm assuming it also saves the licence key there?
Sorry, I'm gonna jump in on OP's behalf
I know they're backed up on your account while you're on the same ROM (ie if you go out of range and come back, it automatically reconnects), but changing ROMs or any full-wipe situation will remove all network passwords. If there is a more advanced way of saving network passwords so they survive a full-wipe, I'm interested in knowing as well.
Also with saving APN information. Everytime I full-wipe, it identifies the Optus network apn, but I have to manually input the Virgin information everytime (know it off by heart!).