Washable, Wearable Tech with Arduino Question: How does one prepare clothing with embedded electronics for washing?

Background: There are several Arduino boards/clones that are designed for "wearable tech."  (For example, the Lilypad.)  Wearable tech with LED light patterns, microphones, GPS, or other circuitry is an interesting concept, but water and electricity tend not to mix.

To prepare wearable tech for washing, I would assume people make large circuitry removable.  Yet, inevitably, some electronics will be more-or-less permanently affixed to the cloth.  What, if anything, can be done to these electronics (e.g. sewn-in Arduino Lilypad) to make them washing-machine (preferred--hand wash could be done, but it's so much easier to machine wash) safe?
I would use some sort of epoxy and cover up the exposed circuitry. The major concern would be where the wires connect to the board as flex over time can weaken it.

Some options include:


3M™ Scotchcast™ Wet-Niche Potting Kit
Hysol


  US1150™—For electronics, telecommunications, and automotive
  components. Provides environmental hazard protection.
  
  US1152™—For electronic assemblies. Provides environmental hazard protection.
  
  Heat might play a factor if you cover up the boards in epoxy but you shouldn't be producing that much heat in a wearable device anyway, right?