grouping, sorting, splitting

Hi,

I have XML if the form:

<page>
<entry date="2005-04-15">
 <title>foo</title>
</entry>
<entry date="2005-04-15">
 <title>bar</title>
</entry>
<entry date="2005-02-05">
 <title>baz</title>
</entry>
...
</page>

Which I am trying to group by date, sort by tiltle and then split into
sets of 3, 3 being the number of columns in the HTML TABLE element I
am trying to produce as an end result.

I've got the grouping and sorting:
<xsl:for-each select="entry[key('days', @date) and count(.|key('days',
@date)[1])= 1]">
<xsl:sort select="title"/>

and I've even got the first item in each group of three from that
grouped and sorted set:
<xsl:for-each select="key('days', @date)[position() mod 3 = 1]">

But I just can't seem to make the final leap to displaying the
following siblings of the above, making the 3 cell rows. Should I be
doing this some other way or can someone help me where I am?

Many thanks,
Stephen