aakk9999 - 10:52 pm on Jan 20, 2011 (gmt 0)
I have different exepience - also with major site re-launch that was done mid October. Home page was PR6 and is now still PR6. After this PR update all internal pages remained PR0.
Relaunch included new IA, URL rewrite used across the whole site with one to one 301 redirect from old dynamic URLs. The site also has fair amount of deep links to internal pages.
After relaunch, PR0 URLs immediately started to rank better than previous dynamic URLs, but with this PR update we have seen no change in PR for internal pages.