Assuming you get this...
I have no idea how the web portal works, except that you can probably
search through it and find your thread.
However, you can always search the archives (use your name/email address
in the Author box):
http://groups.google.com/advanced_group_search?q=group:*excel*
When I did that, I found one thread, posted yesterday, with two replies.
Note that it takes 4-12 hours for posts to show up in the archives.