[lug] LVM on RAID on Ubuntu

[durist at frii.com]

I'm about to upgrade my wife's Ubuntu 6.10 box to 7.10. It's currently running 
on RAID1, but I'd like to add LVM on top of the RAID for flexibility. I've 
spent a lot of time googling, but not found very much on this that seems to 
be up to date. I'm planning to do a new install (rather than an upgrade), but 
I have a few questions, if anybody knows the answers:

1) Can I put /boot and swap on LVM? 
2) For swap, is there a significant performance penalty?
3) Can I use grub, or do I have to use lilo? Is there any special 
configuration I need to do?
4) Any special installation caveats or quirks of the Ubuntu installer I need 
to know about?

Thanks.
-- 
Dan Urist
durist at frii.com