The whole Windows Live thing seems to be passing me by.

Some of these I probably use already (Windows Live Messenger, for example) and I've tried some of the new tools (I really like certain elements of Windows Live Writer, the blogging tool), others I don't even comprehend from their names (Windows Live Agora - apparently it's a marketplace for Windows Live tools, but that hardly seems obvious from the name!). You can get a list of the current services from The big list of Windows Live services.