Offline list of friends currently online

There is a URL that one can use to see which of your friends are currently online:

http://secondlife.com/community/friends.php

which is great if you only have one account. BUT, if you have more than two, it would be eminently useful to be able to quickly see which friends are online in all of your accounts.

Does anyone have such a tool?

I've tried, without success so far, to write a tool that logs in and fetches that webpage.

I've also tried to see whether sldump.exe (which comes with libsecondlife) could be used to do this, but no joy there either.

Does anyone have any ideas?

I could make soemthing like this, just send me an IM inworld.
Basil Lefevre