Hi,

     there is a device from Harris semiconductor which will drop 110 -
     240Vac to 5v 50mA with no transformer.  Effectively this is a
     world-wide autosensing single-chip PSU.  I have one at home, and will
     get the part number if I remember.  In the UK they are available from
     Maplin, not very expensive.

     Andy (#2)