In hopes of being able to use it with my R7-372T-77LE, I got a Dell Active Stylus. However, when I use it I can see the cursor hovering where the stylus on the screen, but neither of the two buttons work.
This seems to suggest that it would work properly:
http://community.acer.com/t5/S-and-R-Series-Laptops/Does-the-latest-Aspire-R-13-refresh-have-a-digitizer-stylus/m-p/419369#U419369
But a post here says otherwise:
http://community.acer.com/t5/S-and-R-Series-Laptops/Aspire-Active-Stylus-V-NP-STY1A-005/m-p/423088#U423088
So, considering that the stylus is able to move the cursor around but the buttons don't work, is my stylus broken or does the r13 not support it properly.