Can new inbound links increase PR of a redirected page?

I'm using .htaccess to serve a 301 Redirect to a new URL. I have 2
questions:

1.) Will *new* inbound links to my original URL increase the PageRank
of either the original URL or the newly-redirected-to URL?

2.) Having told Google that the file has permanently moved (with a
301), is that URL permanently excluded from being indexed ever again?
(I may want to put something else there later).

Many thanks if you can help!
P