Yes hardly 15 days ago WordPress 2.6 was launched !! I upgraded to it. Working fine for me. I didn’t notice any flaws but still tester are the great people. they do great things with there box.
Few Major Issues observerd :

• Sporadic timeout /wp-includes/gettext.php
• Category/tag URL changed if the permalink structure has static strings
• Publishing directly sets wrong date on ‘post_date_gmt’

55+ more issues where solved in the new one launched yesterday !! Proud to say I upgraded to WordPress2.6.1

When You blog its essential to tell others that you have updated your blog. Update Service in WordPress is the Service which helps you to do this.

Update Services process the ping and updates their proprietary indices with your update. Now people browsing sites like Technorati or Sphere can find your most recent posts!!

By default wordpress sends ping to

http://rpc.pingomatic.com/

here goes my Updater list :

http://rpc.pingomatic.com/

http://rpc.technorati.com/rpc/ping

http://blogsearch.google.com/ping/RPC2

http://1470.net/api/ping

http://api.feedster.com/ping

http://api.feedster.com/ping.php

http://api.moreover.com/ping

http://api.moreover.com/RPC2

http://api.my.yahoo.com/RPC2

http://api.my.yahoo.com/rss/ping

http://bblog.com/ping.php

http://bitacoras.net/ping

http://blogdb.jp/xmlrpc

http://blog.goo.ne.jp/XMLRPC

http://blogsearch.google.com/ping/RPC2

http://blogmatcher.com/u.php

http://bulkfeeds.net/rpc

http://coreblog.org/ping/

http://mod-pubsub.org/kn_apps/blogchatt

https://phobos.apple.com/WebObjects/MZFinance.woa/wa/pingPodcast

http://ping.amagle.com/

http://ping.bitacoras.com

http://ping.bloggers.jp/rpc/

http://ping.blogmura.jp/rpc/

http://ping.blo.gs/

http://ping.cocolog-nifty.com/xmlrpc

http://pinger.blogflux.com/rpc/

http://ping.exblog.jp/xmlrpc

http://ping.feedburner.com

http://ping.myblog.jp

http://pingqueue.com/rpc/

http://ping.blogg.de/

http://ping.rootblog.com/rpc.php

http://ping.syndic8.com/xmlrpc.php

http://ping.weblogalot.com/rpc.php

http://ping.weblogs.se/

http://rcs.datashed.net/RPC2/

http://rpc.blogbuzzmachine.com/RPC2

http://rpc.blogrolling.com/pinger/

http://rpc.britblog.com/

http://rpc.icerocket.com:10080/

http://rpc.newsgator.com/

http://rpc.pingomatic.com/

http://rpc.tailrank.com/feedburner/RPC2

http://rpc.technorati.com/rpc/ping

http://rpc.weblogs.com/RPC2

http://rpc.wpkeys.com/

http://services.newsgator.com/ngws/xmlrpcping.aspx

http://signup.alerts.msn.com/alerts-PREP/submitPingExtended.doz

http://topicexchange.com/RPC2

http://trackback.bakeinu.jp/bakeping.php

http://www.a2b.cc/setloc/bp.a2b

http://www.bitacoles.net/ping.php

http://www.blogdigger.com/RPC2

http://www.blogoole.com/ping/

http://www.blogoon.net/ping/

http://www.blogpeople.net/servlet/weblogUpdates

http://www.blogroots.com/tb_populi.blog?id=1

http://www.blogshares.com/rpc.php

http://www.blogsnow.com/ping

http://www.blogstreet.com/xrbin/xmlrpc.cgi

http://www.holycowdude.com/rpc/ping/

http://www.lasermemory.com/lsrpc/

http://www.imblogs.net/ping/

http://www.mod-pubsub.org/kn_apps/blogchatter/ping.php

http://www.newsisfree.com/RPCCloud

http://www.newsisfree.com/xmlrpctest.php

http://www.popdex.com/addsite.php

http://www.snipsnap.org/RPC2

http://www.weblogues.com/RPC/

http://xmlrpc.blogg.de

http://xping.pubsub.com/ping/

http://www.zhuaxia.com/rpc/server.php

http://www.blogsdominicanos.com/ping/

http://www.xianguo.com/xmlrpc/ping.php

http://www.feedsky.com/api/RPC2

http://bblog.com/ping.php

http://blogbot.dk/io/xml-rpc.php

http://www.catapings.com/ping.php

http://effbot.org/rpc/ping.cgi

http://thingamablog.sourceforge.net/ping.php

http://ping.bitacoras.com

http://bitacoras.net/ping

http://www.catapings.com/ping.php

http://fgiasson.com/pings/ping.php

http://rpc.icerocket.com:10080/

http://www.holycowdude.com/rpc/ping/

http://zing.zingfast.com/

http://services.newsgator.com/ngws/xmlrpcping.aspx

http://www.blogpeople.net/servlet/weblogUpdates

How to Set these ??

go to Settings –> Writing –> scroll Down –> Update Services

Put above urls there and save changes !!

If you guys are having some more updater’s then Do let me know.