Wishlist: Multiple podcast download threads

If I recall correctly, Rhythmbox used to be able to download multiple 
podcast files simultaneously.  Now it is restricted to one at a time.  
This is really annoying when one podcast in the mix is coming from a 
source that throttles heavily.  Allowing multiple download threads would 
let the other podcasts download without being held up by one 
ridiculously slow file.

Example:  I download 7 NPR podcasts, which download efficiently.  I also 
download a Commonwealth Club podcast, which downloads slowly.  If the 
CWC podcast downloads first, the others have to wait well over five 
minutes to begin.  In that time, I could have downloaded every episode 
of the other podcasts and started to listen, allowing me to move away 
from the machine and be working on other things.

Thanks