SmarTone-Vodafone has launched its iPhone 3GS price plans. Note that this is only for the 8GB model and only comes in black.
iPhone 3GS (8gb) from SmarTone
The 3GS is free if you commit to a contract starting at $248/month.
For more details and the fine print, see here: SmarTone-Vodafone | iPhone – Price Plans.