What would be a good logo with the theme "Hello world!"?

Since our study’s union celebrates its fourth lustrum in January, we’re organising a week full of activities. However, since we want to start with promotion now, we need to have a logo. And of course, Fluther is perfect for logo ideas!

The theme is “Hello world”, which is firstly a reference to the programmer’s hello world (because we’re geeks) and, more importantly, to the world, since each day will be focused on a different continent. Perhaps our study’s logo helps when it comes to inspiration, just keep in mind: a globe in that circle really doesn’t work.