It was pretty much simple to see resource utilization and availability in Project server 2003. Simple open the project and go to resource usage view. Project server 2007 now has some changes to the system. As there are changes in terms of Projects, Resources and teams so Bill Raymond has blogged about the ways where we can see resource utilization;
First, you typically start with a resource stored in the Enterprise Resource Pool (which is stored in a SQL Server database). Once you assign a calendar to the resource, Project Server will understand what you’re typically week’s capacity looks like. With this knowledge, Project Managers can assign a resource to tasks in their project plans. Once published, the Project Server website (Project Web Access) will display views show how much a resource is utilized, when they are available and what the future outlook of that resource’s availability might look like.
Jerry Yasir's Blog 
Hello. Thank you for posting my blog video. I have added a link to your blog on my site. -Bill
How could I change the date format of PWA for project server 2007? The current format is mm/dd/yyyy. I would like to change it to dd MMM yyyy.
I just want to know some of my projects task is not prepopulated in my timesheet view for a timesheet period.i have to include the task manually by clicking add line button in mytimesheet view..while the timesheet period creating at that time only its displaying the prepopulated task in mytimesheet view.further inclusion of task from project paln in same time period is not displaying.y is it so