This trick is not for those who are already well versed with google and google footprints. I know that some of you already know this method.. 
But for the REST of the community, come along with me:
1. Open the Big G (google.com)
2. Type the following footprint
3. Hit Enter … BINGO!!!!!
To find the latest WSOs
Click on “More Search Tools” on the left side column
Choose
Past hour
Past 24 hours
Past week
Past month
Past year.
I recently came across this huge pinglist, it might be useful to my fellow bloggers.
http://1470.net/api/ping http://a2b.cc http://a2b.cc/setloc/bp.a2b http://api.feedster.com/ping http://api.moreover.com/ping http://api.moreover.com/RPC2 http://api.my.yahoo.co.jp/RPC2 http://api.my.yahoo.com/ping http://api.my.yahoo.com/RPC2 http://api.my.yahoo.com/rss/ping http://audiorpc.weblogs.com/RPC2 http://bblog.com/ping.php http://bitacoles.net/notificacio.php http://bitacoles.net/ping.php http://bitacoras.net/ping http://blo.gs/ping.php http://blog.goo.ne.jp http://blog.goo.ne.jp/XMLRPC http://blogbot.dk/io/xml-rpc.php http://blogdb.jp http://blogdb.jp/xmlrpc http://blogdigger.com/RPC2 http://blogmatcher.com/u.php http://blogoole.com/ping http://blogoon.net/ping http://blogpeople.net/ping http://blogroots.com http://blogroots.com/tb_populi.blog?id=1 http://blogsdominicanos.com/ping http://blogsearch.google.ae/ping/RPC2 http://blogsearch.google.at/ping/RPC2 http://blogsearch.google.be/ping/RPC2 http://blogsearch.google.bg/ping/RPC2 http://blogsearch.google.ca/ping/RPC2 http://blogsearch.google.ch/ping/RPC2 http://blogsearch.google.cl/ping/RPC2 http://blogsearch.google.co.cr/ping/RPC2 http://blogsearch.google.co.hu/ping/RPC2 http://blogsearch.google.co.id/ping/RPC2 http://blogsearch.google.co.il/ping/RPC2 http://blogsearch.google.co.in/ping/RPC2 http://blogsearch.google.co.it/ping/RPC2 http://blogsearch.google.co.jp/ping/RPC2 http://blogsearch.google.co.ma/ping/RPC2 http://blogsearch.google.co.nz/ping/RPC2 http://blogsearch.google.co.th/ping/RPC2 http://blogsearch.google.co.uk/ping/RPC2 http://blogsearch.google.co.ve/ping/RPC2 http://blogsearch.google.co.za/ping/RPC2