Cheapest Flash stream Hosting?

Need some help, I'm looking for the very least expensive host or CDN to host and stream from (live & on-demand) using FMIS 3.5 and related flash servers. Can anyone provide the cheapest place to host and CDN from? I willl consider both Adobe or Wowza.. but ideally want Adobe.

Also, many cheaper hosts or CDNs use Wowza, i'm wondering if you have any major pros vs cons type comments about going with Wowza?

Thanks in Advance!