I read a post yesterday where flagamuffin and BrainBurner mentioned hubski merchandise. I thought that would be cool, so I used the topics on my feed as the basis for the following t-shirt concept (links below). The idea involves having a range of images representing popular #tags that could be selected, in addition to a range of 'themed' colours, to create a t-shirt as unique as your own feed. Completely impractical to print, but I thought it was a nice idea. This would be mine.
T-Shirt: http://imgur.com/Fa7elNm,NlvUPh2#1 Artwork: http://imgur.com/Fa7elNm,NlvUPh2
I would welcome feedback. Probably worth mentioning that I didn't design it to actually print any t-shirts, but would be happy to supply the original artwork if someone wants it - assuming mk is okay with that.