Jacob, I don't think Canon have exchange offer.
You can put your product up for sale here TE market or in jjmehta or ebay wherever you feel convenient.
teche,
HX10V is not an upgraded version of HX9V, but HX7V. HX20V is the upgraded version of HX9V.
SX240/260, TZ30 and HX20/30 are the three most popular travel zoom cameras. All the three models are good. Again its a matter of priority...
SX240/260 - You get best IQ, you may have a hack in few months...
HX20/30 - You get best video, extra frills like HDR, panaroma. But lacks priority mode (it's not a big "con" but still...)
TZ30 - You get those extra frills, priority mode, best AF in the category...