Especially if you want to save time maintaining all those links in your blogrolls.
You can synchronize your blogrolls on your blog with folders in your Google Reader. Which means zero maintenance for your blogrolls: they’re automatically updated when you update your Reader subscriptions.
I actually found this solution on another site so I’ll just point you there: http://www.adashofbitters.com/2009/01/02/blogroll-google-reader-wordpress-easy/
You can see it in action in my sidebar on the right. Several of those link lists are being fed from Google Reader, such as the one called "SQL Blogs @Microsoft".