In this part of the world, Dick Smith Electronics sell them - they are
600mCd devices, from memory, and (compulsive purchaser of new technology
that I am) I can say that they work quite well, emitting a white light
with a touch of blue. As they use a phosphor coating over a blue LED,
off axis radiation is also white, unlike the multi-chip white LEDs.

There is a LED page on the net somewhere - try this for more info,
perhaps

> ----------
> From:         ERIC SCHLAEPFER[SMTP:eric.schlaepfer@AUTODESK.COM]
> Reply To:     pic microcontroller discussion list
> Sent:         Sunday, November 02, 1997 5:13 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      White Leds [OT]
>
>      Hi all,
>
>      Does anyone here know where to get more information on these
> white
>      leds? I have an project that has been waiting for such leds.
>
>      Later,
>
>      Eric
>