Hi To all i have some another question for the search engine. I have little confused in google and igoogle service.
iGoogle is like a Google Desktop for your browser, where you can place all kinds of widgets and stuff. Google.com is just the search engine, plain and simple.
Above ones already mentioned a short details. I would recommend you reading these official sources for more details What is iGoogle? iGoogle - Wikipedia
Igoogle has some similarities with yahoo. Yeah is more personal. While google is a simple search engine with a very simple interface.
Google is a search engine while iGoogle is a personal page for different people who have different tastes, where you can place all kinds of widgets and tools.
my understanding is that igoogle is a customisable page in google. It's like having a personal shopper.