Rumor has it that Apple has changed the spelling of their newest iPhone just days after its release.

Following some controversy over the initial spelling which was 3G S, Apple has now changed its material to fit the new spelling 3GS. Not a big deal, but makes you wonder what was the reason behind this sudden and silent change. Is it for legal purposes or for the name to be more search engine optimized?

What do you think is the reason behind this change?