Per this official post, I should be able to use the PC client as well:

http://forum.square-enix.com/ffxiv/t...=1#post1031291

Greetings,

Version 1.0 account holders that have redeemed a PS3 pre-order code for early access on their account are now eligible to play on the PC version as well!
However, logging into the PC client gives me a no valid service accounts error. I have already linked my SE Members and PSN accounts. Still no luck.