How to Increase Blog Storage Space with Multi-Site

I just upgraded to 3.0.1 MultiSite and am switching from Supporter to Membership - it just makes more sense for my site.

The problem is that Supporter had a function to set default storage space amounts.

Now, all of my sites have reverted to 1MB of Storage Space.

How can I set the amount across all Sites to be higher?

And can I set the main blog even higher?

Thanks!

Let me also add...I don't have a "Blog Upload Space" field under Super Admin - Options.