Washi Tape

I've Tweeted about this a few times already but washi tape is my absolute favorite new thing this year!  My friend @mkschoen got me hooked when we decorated her library before school started.  Here is a sign we jazzed up simply by adding tape. I think this tape was actually Scotch Expressions which was more like a regular Scotch tape texture, where washi is like a masking tape and I find easier to use.
Before:

After:

Since then, I've used washi tape on tons of different things in my library - some functional, some decorative. Functionally, I've used it to define areas on my whiteboard like my center choices board:

and to help identify library neighborhoods like my graphic novels:

and to mark the library laptops since I have the same laptops as many classrooms:

I have also added washi tape to different items in the library to jazz it up:
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Anyone else tried out washi tape?