Today I was asked about what eCPM really means by my friend.
Just thought to post it for others

eCPM is nothing but Effective CPM which is the effective cost per 1000 impressions generated by a cost-per-click ad. eCPM is determined by multiplying a number of factors, including the ad’s cost per click (CPC) and its clickthrough rate (CTR). The resulting eCPM can be used to rank CPC ad campaigns against CPM campaigns.

I hope you understood what eCPM means.

If you have probably come here by mitake searching for eCPM and its not about advertising, here are eCPM definitions from Dictionary:
Acronym Definition
ECPM European Christian Political Movement
ECPM External Combustion Power Module
eCPM Effective CPM (Cost Per Thousand impressions; advertising)

Authored by Arne Brachhold in the early days of the Google SiteMaps release by Google. This plugin is so famous that almost everyone who is aware of the importance of the Search Engine Registration, listings and rankings uses it these days.

I feel this is one of those plugins which makes wordpress the best among the blogging tools.
I have just started using it. But I was using Google SiteMaps since its lauch in the first week of june 2005 for many of the sites that I work on

You can download the latest version of this plugin here: download 2.7
You can view the complete log of the development here: final release
Take a look at the Screenshot.

Being a wordpress plugin and giving 100% support to the wordpress blog, the coolest thing about this plugin is that we can also add pages that are not generated by wordpress. That means if you have a page like http://www.mydomain.com/flash/index.html which is not generated by wordpress(http://www.mydomain.com/blog/), you can add this page too in the plugin’s admin panel and the plugin pings google via google-pings telling the changes in the site.

Cool isnt’it?