Best software to enable speech-to-text on HTC Desire One of the notable features missing from the HTC desire that is found on the Nexus one is the speech to text.

I am using google voice search and am impressed therefore what is the best software (free or paid) to enable the dictation of emails and text messages.
Have a look at Vlingo: http://www.appbrain.com/app/com.vlingo.client 

It learns over time and many people find it more accurate than google's voice recognition.