SlyDial lets you jump straight to voicemail to leave a message. You can pay a fee for the service, or agree to listen to an ad first before leaving a message. Glenn gave the service a trial run and it seemed to work as promised—he listened to an ad and then left a message. Today, however, the company “slydialed” him and left a second ad in his voicemail box. That’s certainly sly, but sounds to us like an abuse of the service as they’ve described it. You might want to avoid using them until we find out more about why they’re spamming previous customers, or check back on Glenn’s blog to see what develops.