aacf4497__Blogger__Tumblr_and_Posterous__0
[Blogger.com] 1GB for Photos shared with your Picasa web account. More on Limits. You can always upgrade (max 16TB) by paying. [Wordpress.com] 3GB Storage for Images/Files. You can pay and get upto 200GB. Audio uploads are only supported if you buy a space upgrade. For uploading Videos, you need Videopress. [Tumblr] As such no total limit. They have individual limits for each type of uploads. Detail mentioned in the post. [Posterous] 100 MB Upload limit per post. [0] 
Space Limits
Choosing a Free Blog Host - Comparing WordPress.com, Blogger, Tumblr and Posterous
0