Back in May we mentioned the Do Not Disturb app that Verizon was promoting for dumbphones. Turns out that the app was actually designed by RiffWare and actually works similarly to other BlackBerry apps that block calls.
They just let me know that their app Do Not Disturb is available in the App World at this link for $6.99. I never buy anything from the App World myself since I change devices more often than they allow but if you do it might be worth a look. I am just glad they dropped the $3.49/month subscription fee they had for their feature phone version.