I do not believe ghost exits. Even it really exits, I doubt that Electro-Magnetic Frequencies (EMF) can detect it. That being said, I still think that Ghost Detector application is very cool, especially you can be part of the live TV program.
Via Crazy Bob’s blog, this is the RSS feed for Google Developer Day.
A few links:
Google Gears
Guice, Java Dependency Injection
Not many of them are directly related to mobile, but here is one:
Building a Mobile Website
Other wonderful technical presentation video resources:
Google engEDU on Google Video
Parleys - talks from JavaPolis, BeJUG, SpringOne
Presentation section at InfoQ
Open Source Software for Mobile Phones