I might be asking for flame ignition here, but I just have to get
this out.  A Dongle may be a fun and interesting excercise in
hardware encryption.  However, to some end users, it's one of the
most annoying inventions ever created.

  I regularly use five different CAD packages now and the prospect of
chaining dongles, or switching them through a box, everytime I
migrate from one package to another, is not a pleasant one.

  I returned an EAGLE layout package because It had one of these
things, and I wrote them a long letter about a dongle hang-up on PCAD
which cost me a week of downtime. They wrote me back telling me that
they get a lot of the same feedback from other customers.  Now
CADsoft is shipping EAGLE 3.5, touting the lack of a dongle as a
"feature".  Good for them; I've just placed my order.  The AutoCAD
v13 I'm running now doesn't use a dongle either.

Just my humble opinion.

                                        Mike