This may be late. I probably haven't read a lot of Google Blog posts which resulted to me not knowing about this. Anyway, for those not familiar yet, Google added another service to its Google Docs: Drawing.
Google Drawing is like an online version of OpenOffice.Org Draw, or like the drawing feature of your Microsoft Office suite. Most of the icons are the same, while the basic capability of drawing diagrams is included.
What's the benefit of this new feature in Google Docs? For those into making everything online so that you don't need to save anything in your limited disk storage space (reference: first-generation netbooks), this will be another way to save data online. Another is with the file online, you can be sure that whatever you create will be saved as is when you upload it to your online presentation or document.
This is just a basic observation of the new Google feature. I hope to learn more about this to see how it will help teaching. 'Til next time!