match all attributes except @foo

I'm sure I will say 'doh!' when I see the answer to this one :-), but...

I currently have this inside an <xsl:copy>:

              <xsl:apply-templates select="node() | @*" />

The second branch of that union selects all attributes.  I want to 
change it so that it matches all attributes except for the attribute 
'foo'.
IOW, my <xsl:copy> should filter out @foo.  How do I do it?

Thanks a lot,
mark