Sounds useful for some cases.
Here's my suggestions on how to express it, in decreasing order
of how much I like it:
#1 Using DSSSL and the <styles> element that Dave Ragget
is cooking up.
(ok... overkill for now...)
#3 <body background="foo.xpm">...</body> or
<body texture="foo.xpm">...</body>
#2 <?Netscape BACKGROUND-IMAGE="foo.xpm">
#4 <LINK REL=BACKGROUND-IMAGE HREF="http://www.foo.com/allwhite.pbf">
Item #2 is only necessary if nobody else is interested in implementing
it. If most browsers will support it, something like 3, 4, or (would
that it were so) #1 is more appropriate.
Dan