I'm most confused about RadioButtons (RBs) on a .aspx page I build with SPD and
how to make them work (MOSS site). Do they operate on the client, or via a
round-trip to server?

My goal is to make a modified DFWP display respond to RBs on the same page. Does
this imply: must be client or must be server?

What I've done with SPD:
1) put a table on blank aspx page
2) put DFWP of a custom list into last row of tbl
3) put RBs into 1st row of tbl
4) make sure this displays OK
5) but my DFWP cannot "see" the RBs & vice-versa

So,how do I connect up the RBs to the XSLT of the table display?
(I guess, get the RBs values into parameters?)

Some of the things I've blogged build RBs in XML then somehow get the result
into XSLT, others seem to use java-script