I have a touch HD and use an extreme mac armband it work really well although it is designed for an iphone (the HD and iphone are the same size though). I think an armband might work for you. An alternative is a waistband but these make me feel sick when I run.
While I was waiting for reply from John (Zephyr) I came to decision that for $130-160 there are some another good waterproof options (HR monitor + Watch), which can be used during swimming as well. Of course this is not run.gps integrated but have some advantages.
For example http://www.timex.com/gp/product/B001GWYACK/ref=sc_pgp_c_1_1_267161011_m_A1S5XB33AHYRMX_2/179-9935399-7731432?ie=UTF8&n=267161011&s=&timexBrand=core&v=glance
Am I right or not?
Yes you can use your bluetooth stereo headset at the same time as other bluetooth device.
I have already try several walks were I had:
1) a bluetooth stereo headset
2) an external GPS bluetooth module
3) the HxM
during the walk Run.gps was running (getting info from the external GPS and HxM) and the windows audio manager was playing music to my bluetooh stereo headset. there was no issue, for info my test walks were around 1h30 in duration in average.
try also this email: john.molloy@zephyr-technology.com
but be patient, when I ordered my HxM in january from him, it took at least one week to get a first response on my inquiry, but after that it was fast (I did pay with paypal).
Dear friends, will Zephyr HRM/HxM be available in shop?
If yes how long we will have to wait?
If no, please inform us where we can buy it?
Actually there is no any reply for requests to producer including e-mail mentioned below :(