Link to power management controller still works for me.
https://people.openmoko.org/tony_tu/...F50633UM_6.pdf
Try http instead of https, or you may need to allow security certificate from untrusted site -
http://people.openmoko.org/tony_tu/G...F50633UM_6.pdf
It works as http: with Firefox, may be more a a problem with Internet Explorer.