The most obfuscated Hello program. You write a SYSTEM that simply asks the user their name and then prints "Hello "+the given name. The twist is that your system must involve MANY different technologies in creative ways to get the input finally printed.
For example, I write a java program that first asks the user for their name (Arnold for example), then creates an email with content "Hello Arnold" sends it to student233@credit.erin.toronto.edu. In the mean time the original java program starts trying to read incomming mail for student233@credit.erin.toronto.edu. When it locates the appropriate email, it opens it, reads it and finally prints it out.
The longest, most creative path wins.
An example is in here