I was thinking, would it be tough to create a fake phonecall app? In short, it's an app which 'calls' you at a defined time - but there's no actual air time, it's an offline dummy call.

It can be a fun app to use, and might even get you out of upcoming embarrassing situations.

Possible feature list:
- Set phonecall time - very similar to the alarm on Maemo 5, you have the choice to set when exactly the call's gonna come in, and whether it's daily.
- Select which contact will fake the phonecall, or customize a new fake contact, or select 'unknown number'.
- Choose whether the phonecall ends itself after a certain amount of minutes, or it waits for you to hang up.
- Set an mp3 file to play and loop while the conversation is going. This way you can pre-record a mumbling voice and set it so it would sound real.

I won't be able to program this myself so I'm just throwing my idea here. I guess a similar app can do the same with sms messages.