You know, in 50 years, icons won't be needed. If you want to save your work, blink twice, or stand on your head, or just say "Save" in the language of your choice, and voila - it's saved... no need for a visual anymore :)
I vote using the standard 3.5" icon. When the day comes that it's confusing to users, developers will get plenty of complaints from users saying it's not "user-friendly" enough. As for now, we've been conditioned to look for that disk icon. I used an app once that used a CD icon instead, and it took me a few days to realize that it was used to save. It's all about design consistency and fulfillment of expectations.
