IP Funnels?

Do you have a question? Post it now! No Registration Necessary.  Now with pictures!

Does anyone have experience with IP funnels?

A company with 7 misconfigured domain names -- 6 will be redirected to the
new main site.  Two old ones with PR 6 and 5.  The PR 6 will 301 to the new
main site.  Should the PR 5 redirect to the PR 6 along with the rest (IP
funnel)?  Or should there be 6 sites doing a 301 to the new main site?

Most or all have IBLs, and it's a legitimate redirect.  All the information
from the other sites is consolidated on the new main site.

Site Timeline