It's sad to see, but Speakerdog will be closing up shop on March 31st, 2010. Here's their press release:
For the passed 6 years we have all enjoyed a wonderful journey around the world with our very special friend, Speakerdog. He has taken us to meadows and cities, through forests and fields, up mountains, across oceans, over the clouds and under the rainbows. We are sorry to tell you that Speakerdog is now setting off on his final journey, sailing into the sunset. Fi and I have had such a blast playing with our little character over the years, but the time has come for us to say farewell to our little buddy while we focus our life on the two little characters in our own home (namely, our dog Doze and our new son Woody).