Now this wasn't on the original list of Delicious things, but I saw it today and really want one - it's a Sharpie pen designed by Plexifilm
to only write in Helvetica!
You can't actually buy one, as they are only available as a free gift with any purchase from the 'Helvetica' merchandise range while stocks last, but unfortunately I can't find any mention of them now so it looks like they have already sold out.
It is sold with a warning though - "If you are John Downer or Marian Bantjes then the pen will actually write in Helvetica. Otherwise, your results may vary. Do not swallow. Keep away from open flame and co-workers. May cause drowsiness".
Via the fabulous Hero Blog.