Ping help us to index first on search engine. here is example of some ping site.

http://blogsearch.google.com/ping/RPC2
http://1470.net/api/ping
http://api.feedster.com/ping
http://api.moreover.com/RPC2
http://api.moreover.com/ping
http://api.my.yahoo.com/RPC2
http://api.my.yahoo.com/rss/ping
http://bblog.com/ping.php
http://bitacoras.net/ping
http://blog.goo.ne.jp/XMLRPC
http://blogdb.jp/xmlrpc
http://blogmatcher.com/u.php
http://bulkfeeds.net/rpc
http://coreblog.org/ping/
http://mod-pubsub.org/kn_apps/blogchatt
http://www.lasermemory.com/lsrpc/
http://ping.amagle.com/
http://ping.bitacoras.com
http://ping.blo.gs/
http://ping.bloggers.jp/rpc/
http://ping.cocolog-nifty.com/xmlrpc
http://ping.blogmura.jp/rpc/
http://ping.exblog.jp/xmlrpc
http://ping.feedburner.com
http://ping.myblog.jp
http://ping.rootblog.com/rpc.php
http://ping.syndic8.com/xmlrpc.php
http://ping.weblogalot.com/rpc.php
http://ping.weblogs.se/
http://pingoat.com/goat/RPC2
http://rcs.datashed.net/RPC2/
http://rpc.blogbuzzmachine.com/RPC2
http://rpc.blogrolling.com/pinger/
http://rpc.icerocket.com:10080/
http://rpc.newsgator.com/
http://rpc.pingomatic.com
http://rpc.technorati.com/rpc/ping
http://rpc.weblogs.com/RPC2
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.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/

best 10 gadget nominated by TIME
1. ipad 2
2. samsung galaxy nexus
3. Amazon kindle fire
4. Apple iphone 4s
5. Nintendo 3ds
6. Sony S Series Vaio
7. Roku LT
8. Apple Macbook air
9. Sony Playstation 3d Display
10. Motorola Attrix

1024

AIOCP

Alfresco

AssoCIateD

Blogger

Bcoos

BigAce

BitWeaver

BloofoxCMS

BricaBox

clickbooQ

CMS Made Simple

ClickCMS

ContentNow

Dragonfly CMS

DBHcms

Drupal

Doodlekit

Ekklesia 360

e107

eazyPortal

Elxis

Etomite

Exponent

ExV2

Enano CMS

ExpressionEngine

eZ Publish

Ellington

Flying Cart

Fundanemt

Frog CMS

Geeklog

GOGOFROG

GoodBarry

Gelato

Inserit

iGaming CMS

Jogango

Jimdo

Jaws

Joomla

Leafletter

Liferay

LoveCMS

LightCMS

Moodle

Magento

Mephisto

Mambo

MDPro

MODx

ModX

MoveableType

Netious

Ovidentia

OneCMS

Pagety

PHP-Fusion

PHP-Nuke

phpwcms

Postnuke

Prestshop

Pligg

Pheap

phpWebsite

Plone

PLUME CMS

Radiant

RunCMS

Reflect

Roxer

Shopify

sNews

SchoolRack

Shopit

SpotMerchant

Silverstripe

SiteMighty

Symphony

Triggit

TeamSnap

Texty

TypePad

TypeRoom

Tuplix

toendaCMS

Textpattern

Typolight

typo3

TikiWiki CMS

uShop

WordPress

Webnode

Weebly

Website Baker

Wirenode

Xaraya

XOOPS

YACS

Zinadoo

Facebook says that, on average about 100000 users play games on facebook.

1. Gardens of Time (By Playdom)
2. The Sims Social (By EA)
3. Cityville  (By Zynga)
4. DoubleDown Casino (by DoubleDown Interactive)
5. Indiana Jones Adventure World (By Zynga)
6. Words With Friends (By Zynga)
7. Bingo Blitz (By Buffalo Studios)
8. Empires & Allies (By Zynga)
9. Slotomania-Slot Machines (By Playtika)
10. Diamond Dash (By wooga)

here the list of better registry cleaner & windows optimizer of 2011. i think it will be helpful to you.
1. CCleaner
Powerful registry cleaner
Uninstall programs option
Editing your startup programs
System Restore
Disk Wiper
Exporting some settings to .txt file
Cookies cleaner
Including and excluding additional folders that you wish Cleaner t remove
Saving all settings INI file
Browser history, cookies and browsing data cleaner
Advanced settings.

2. Macecraft Power Tools Lite
Automatically clean your Windows registry.
Automatically fix many kinds of registry errors, such as broken file references.
Detect and remove unneeded history data, MRU, etc.
Delete temporary and junk files.

3. Rizone’s Power Tools
4.
5. Reg Seeker
Registry Cleaner
Program Uninstaller
Tweaks
Backup Option
Startup Entries
History
Favorites
Printing Option

6. Iobit Toolbox

7. Slim Cleaner

8. Jet Clean

9. PC House Keeper
Cache Cleaner
History Cleaner
Cookie Cleaner
Registry Cleaner
File Shredder
Startup Manager
Program Uninstaller
Process Explorer
Disk Cleanup Tool
IP Port Scanner
TCP Connections Viewer
MAC Address Changer
MAC Address Scanner.

10. Combo System Cleaner