I want to get the Global search volume of a keyword programmatically by a PHP Script. By Adwords API or some other API I want to get this data.I want to know Local or Global both search volumes, if possible for a particular country. See the Thread I posted in Google Code Forum

Eric Koelda replied me back and supplied many good references as given below-

To read in details visit this webpage : Google started to count Backlinks from Twitter Facebook Social Networking Sites

Google Mayday algorithm update in May 2010

Algorithm change applied in the first week of May. We came to know about this by a Matt Cutts video which starts with the question "Many are talking about losses of traffic with long tail queries which have 3 or more words in search phrase". Somebody asked him about this. Also they wanted to know from Matt Cutts what's going on Google algorithm, what is the update they are making?

According to Matt Cutts Google algorithm changes more than 400 times every year to increase quality.

You need a robots.txt file only if your site includes content that you don't want search engines to index. If you want search engines to index everything in your site, you don't need a robots.txt file (not even an empty one).