If you've ever wondered why there is no call in comment line for CocoaRadio, it's simply my inability to find a good free solution. Without post-production help, I couldn't really see myself piecing together mp3 comments from email. Nah.
Enter Odeo. Orginally the service was my hope for launching CocoaRadio but then Apple released iTunes 4.9 with podcasting support back in July and set Odeo back a bit, imo. Lately, they have been honing their service with little gems like "send me an Odeo"!
So, send me an Odeo. If you keep it short and sweet, I might just drop your thoughts into a future show.
Update: I've also added this feature to the sidebar; replacing "Skype Me" which never got much use anyway. Their closed network is irking me lately. I opt for Jabber, GTalk, Gizmo for audio chat.