I was just typing up an email, and noticed that I looked down at the keyboard to find the delete key. I asked myself why, and then looked at the keyboards around me. Home, End, Delete, Insert, page up and page down are all grouped together, but on every keyboard I use, they're in a different configuration.
My Dell keyboard at work is:
Home PgUpMy Thinkpad:
Insert Home PgUpMy new keyboard at home:
Delete End PgDwn
Home EndAll three configurations make sense (especially the Thinkpad, which has an additional complexity of space issues), but it seems that at least on the desktop, there should be a standard.