WordPress MU

We have a code that matches the blog id of a site to an external site.In the following code, where it says 558 we need to place something that will grab the current blog's ID number. Putting the ids in manually work properly but would like it to grab it automatcially. Any idea how to do this? Thanks!

a href="http://www.mysite.com/redirector.aspx?utm_source=sp&utm_campaign=partner&utm_medium=banner&utm_content=utm_term=&partnersiteid=558&" ><img src="http://www.mysite.com/banner.aspx?v=4&bannername=SchoolStore2_300x250&partnersiteid=558&system=sp"

You can get the blog ID from the $wbpd object, like so:

<?php
global $wpdb;
$current_blog = $wpdb->blogid;
?>

or could simple use

global $blog_id;

Thank you, worked perfectly, how would I do it for the title of the blog?

Take a look at http://codex.wordpress.org/Function_Reference/get_bloginfo