evernote is a free app for iphone, mac and pc and its also a web app, and that syncs text, voice, and photo notes
it sucks that i have tons of notes,
and now i have to restore my iphone !
The only way to save all the notes is to
manually write them down.
Evernote doesn't let you edit notes that you have already created. It is almost useless for keeping a list.
Try syncbook which offers the best note syncing solution that I've found. It syncs over wifi to a desktop client. You can edit the textfiles in the editor of your choice. I think it costs $4 in the app store. It still has a few cosmetic bugs here and there, but overall it is stable.
Writeroom also has a clever document sharing option, which lets you edit notes on an identical iPhone interface within Safari. However, it doesn't actually sync, but you have to copy/paste to get them on to your desktop.
I've yet to try MobileFinder. It looks promising.
The Notes are backed up, so you won't lose them, even after a restore. They just aren't accessible via the desktop.
And check out Things. That's what I'm using to access notes and to-dos on both the iPhone and desktop. It's not perfect, but it's better than Notes, IMO.
If your a mac user and have an iCloud account your notes will automatically sync between iPhone and mac. To view them just click into your mail.