What do you think of when you see a beaker full of unknown liquids? Scientific experimentation comes to mind. I've noticed a rise in logos and illustrations which contain scientific symbols, such as beakers or test tubes, used to represent the experimental qualities of web/software companies. Here are a few examples that work well:

Trend: Lab equipment logos (Images property of their respective owners.)

I like the idea of borrowing the symbols from a traditional field to represent something new in technology. I used the term 'lab' as part of a name for a friend's new co-working space and love how it symbolizes groundbreaking ideas in action.