"I need to drive a Bluetooth chip that requires CTS and RTS"

Could you just hard-wire the signals?

As Rob Klein said, the MAX232-type chips are simply level translators; they do not have any "inteligence" such as providing flow control.

Some UART chips, however, do provide automatic flow control - but I wonder whether the interfacing is actually any more difficult than doing the flow control yourself and using the on-chip UART?

I think that the interrupt-driven serial IO example on the Keil site might include flow control?
Check it out!