Voice123.com has posted two videos that are well worth some of your time, both focused on the updates they are currently creating and testing.
First is a 17 minute presentation at VOICE 2007 by Alex Torrenegra (President and co-founder of Voice123.com) introducing the updates Voice123.com Ver. 2.0. (NOTE: both of these videos are rather dark, but the audio is fairly clear.)
And second is the Q&A that followed the above presentation, which runs about 25 minutes.