Users of Google AdWords have had access to WordPress tools for some time now. Now, MSN adCenter users have access to a WordPress plugin that looks to a promising tool.
The adCenter Analytics WordPress tool should allow WordPress bloggers the opportunity to track how their PPC ad campaigns are doing and to be able to track traffic to their blog. All it really does is add the adCenter Analytics code to your web pages. But do you really need it?
There are two ways to add the analytics code to your blogs. I’ve done it both ways. You can add a plugin like the adCenter Analytics WordPress or you can add the code to php page and FTP it to your server. I’d had success both ways.
I’d say it’s up to you which way you do it, but keep in mind that WordPress plugins add additional code to your pages and increases your load time. Too many plugins and your blog will become sluggish. That will affect your SEO. So if you have a lot of other plugins then you might consider just FTPing your code. It will be easier.
If the only plugin you are using is the adCenter Analytics plugin and you don’t see yourself using a lot of plugins then by all means you can give it a shot. It shouldn’t hurt.

the overhead should be quite small anyway, and I’ll soon be trying to add in more goodies