Here's the response i got from HTC today,
"In regards to your enquiry kindly note that, yes, the update Android 2.3.5 and HTC Sense 3.0 is available for HTC Wildfire S. The exact date of release for each country is not confirmed at the moment as we work with different operators in different countries to make this release easy and fast as possible. Please soft reset the phone (take the battery out and put it back again) and then go to menu> settings> about phone> Software updates. If update is available please follow the instructions and please try to use Wi-Fi connection (recommended)."
So no need to root and other ****, just be patient.
"In regards to your enquiry kindly note that, yes, the update Android 2.3.5 and HTC Sense 3.0 is available for HTC Wildfire S. The exact date of release for each country is not confirmed at the moment as we work with different operators in different countries to make this release easy and fast as possible. Please soft reset the phone (take the battery out and put it back again) and then go to menu> settings> about phone> Software updates. If update is available please follow the instructions and please try to use Wi-Fi connection (recommended)."
So no need to root and other ****, just be patient.