Persistant Storage Options

Hello all,

I'm looking at the best way to implement storage between sessions (high scores, profiles etc.). The requirements are:

1) Local storage, no network connection required.
2) Cross platform (Win/osx/iPhone(iTGB))

I currently have 3 lines of thinking:

1) Integrate a local DB solution (SQLite or SimpleDB?)
2) Write out a custom file using the file read/write stuff (blurgh..)
3) Save out a scriptObject, compile the CS then delete it to leave a DSO we can load next startup

I've always used option 3) but it's hellishly clunky and open to abuse. Would option 1 work with iTGB and the iPhone? Are there any options I've overlooked?

Any help would be greatly appreciated!

Thanks,

Rob