iOS 7 is coming soon!
As I am sure you all know, iOS 7 will be released next week. See this post from Apple for full details.
I have tested all of my shipping apps, and am not aware of any issues (but see below), although there are a few visual differences. See my post from late June where I go into this in more detail.
With all major operating system updates like this, I would highly recommend backing up all of your app data before upgrading. Don’t just rely on iTunes, use the backup solution in each app, and export your data off your device, just in case anything goes wrong.
On a related note, every few months I am contacted by a customer saying “my toddler has just deleted my app, I restored my purchase from the AppStore but all my data is gone”. Apple’s sandbox model means that apps can only store their data with the app itself (or now iCloud, however this is VERY slow for large amounts of data). This, together with a lot of bad experiences with iTunes backups, is specifically why all of my iOS apps include a backup solution.
If you value your data, PLEASE take regular backups. Oh, and don’t let toddlers play with your main device! 🙂
UPDATE (15th September) – it seems that Apple have changed something behind the scenes that prevents a primary device from sending the initial sync to a new secondary. I have a workaround for this, and will submit it once I see whether there are any other issues.