[Novalug] LVM recommendations

[Matt Good]

I'm about to set up a machine and I thought I'd try out LVM on it since
it's got a big drive and I'd like to be able to partition it more
flexibly.  Any recommendations before I proceed?

I'm thinking about leaving most of the space unallocated since I won't
need it yet, and it should be easier to grow the partitions as necessary
instead of making them too big and trying to shrink one of them later.

I understand there are ways to put the root filesystem on LVM, but that
it isn't supported by default.  Should I try to do this, or just
allocate physical partition for the root partition?  How much of the
filesystem should I expect to put on the root partition?  Can/should I
put swap on LVM?

Any recommendations for filesystems supporting online resizing?  I'll be
using Ubuntu Edgy if anyone knows what kernel patches it includes for
online resizing.  I've used ReiserFS for a while now, but reading things
like SUSE's description of why they're switching to ext3 has me
questioning whether I'll stick with it, and Hans' arrest leaves the
future of the filesystem looking a little uncertain.

-- Matt Good