For those that have had the experience of trying to listen to MP3's with Pocket Tunes or listen to audio books with Audible Player through a cassette adapter and have VoiceDial installed and keep getting "Say a Command", I found out that if I use my Seidio 2-in-1 adapter that I had bought for my Treo 600, I can listen to MP3's in my car using the cassette adapter without any problems. I have no idea why it works, but it does. I have used it now for two days and have used Pocket Tunes, Real Audio, and Audible Player for books.

Plus with the inline microphone, I have a handsfree system using the stereo as the speakers.

I have no idea if the new 2-in-1 for the 650 will work as well. I thought that several of you probably have the one you bought for the 600, and I would share this with you.