ActiveState has a web-based information service known as ActiveState
Programmer Network (ASPN). The free version -- ASPN Open -- is currently
being extended into a comprehensive source for free XSL information.
This message describes one of the most interesting XML/XSLT related
features of ASPN Open: the archive of major XML and XSL-related mailing
lists. This includes a single search interface. A search of "namespaces"
turns up posts on xsl-list, xml-dev and lists related to specific
implementations of XML. I can see from that search that namespaces are
(as always) a hot topic on both the XML and XSL lists.
 
http://aspn.activestate.com/ASPN/search?query=namespaces&type=Archive_XSLT

Let's choose a random message to give a sense of other features of the
archive:

  http://aspn.activestate.com/ASPN/Mail/Message/687373

By Rick Jellife's name (sorry Rick!) you'll see a feature to allow you
to get the list of posts he has made since we started archiving. Click
on "other posts by this author".

Once you get back to the message, you can see its complete thread
context at the bottom.

At the top is a fun but mostly useless feature that allows you to see
who has been busy on the list (called "leaders)". 

  http://aspn.activestate.com/ASPN/Mail/Leaders/xml-dev/

Surprisingly, my name is still in the top ten despite the fact that I
have beenquiet on xml-dev for a while. That shows how much I, er,
"contributed" in the past. Simon St. Laurent and Len Bullard are in
close contention for first place. Going back through Len's archive is
quite a mind-bending experience. And Simon's archive shows a definate
passion for the human implications of technology!
 
http://aspn.activestate.com/ASPN/Mail/Browse/ByAuthor/xml-dev?author=clbullar@[...].com

The "recent" link at the top allows you to catch up on a list that
you've unsubscribed from (e.g. after a vacation). The "archives" link
lets you browse historical stuff.

I hope this service will be useful to the XSLT and XML communities and I
would also like to see it grow and become even more useful over time.
Please submit your suggestions and bug reports to me or to the ASPN
team. If you are interested in XSLT, please also take a look at the
companion announcement on the XSLT Cookbook:

http://aspn.activestate.com/ASPN/Mail/Message/xsl-list/755730
-- 
Take a recipe. Leave a recipe.  
Python Cookbook!  http://www.ActiveState.com/pythoncookbook

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list