You should use the FRWD B100 for this. But you will have to carry it as an extra device. The B100 also has GPS so you could turn off the internal GPS of your PDA to save battery life.
The B100 connects to most HRM belts (see www.frwd.fi).
What I would need is a HRM which has a wrist watch so I can see the Heart Rate while excersicing. I can use any of the HRM suggested on the Run GPS Version 2.3.0 Manual, but do they come with a wrist watch?
Do you know their aprox prices, or where I can find more information? about them? specially on the zephyr ones?
As far as I know there is no Bluetooth HRM available from Polar yet that supports real time data transmission.
If you want to use your Polar F6, you can combine it with the FRWD B100 (139 EUR) which takes the signal from the F6 and sends it via Bluetooth to the Pocket PC. I'm not sure if the F6 and the B100 are compatible but they probably are.
I just installed the new version 2.3.0... and it's really incredible.
But can I only use Zephyr HRM or can I use other bluetooth HRM? I have a Polar F6.... I also hear that Pola developed Bluetooth HRM. Can I use them on RunGps?