Is there anyone running Final Cut 4.5HD on a Macbook with 1 Gb RAM? If so, how does it perform? Is it worth the (substantial) additional expense to go for the Macbook Pro for this application?
FCP 4.5 is not Universal, so it won't even install unless you hack it somehow. And even then...it'll run like absolute bollocks. I wouldn't even put an Intel Mac and FCP 4.5 in the same room.
It's pretty cheap ugrading to upgrade it to the Universal version. If you did to this with a view to running it on a MacBook, 2GB RAM would be advisable.
FC works very very well on MBs and perfomance is basically the same as on as the previous revision of MBPs.