Well my flatmates eMac is on it's last legs and she's looking for a laptop to replace it, and with this firewire debacle I nearly suggested a PC, but I just can't, because I'd be her IT flatmate, which I can handle on the mac side 'cause I'm fine at fixing problems with macs, whereas when windows goes wrong it just infuriates me.
But with her being a hobbyist musician her audio interface and external drives are all firewire, so it looks like it's gonna have to be a plastic macbook. The annoying thing is that in a year since I bought my current macbook for the same price she'll get a 5% processor increase and a superdrive, which is a bit of a rip-off really. As for the memory and HD, they'll go to fit better alternatives in there.
But I was doing some price checks and (in the UK at least) all major retailers I've found can offer the Plastic macbook specs at roughly £100 to £150 cheaper, but the specs I've seen for the sub £500 models all seem to be lacking in the processor and HD and Ram department, granted they appear to have better connectivity (sometimes not needed for all). So I think some of my anger has died down, but I still believe that the new Unibody MB is just a worthless brick for many users, i.e. anything more than email and youtube, and if all you were doing was email and youtube what's the point in spending that much when a PC at half the cost will do it just as well.
If the classic MBP deals are as phenomenal there as they are stateside, that may be the way to go.