JAILS: Shared IP?

[Chris]

When co-locating a FreeBSD box being used for 4 websites (inside jails),... 

1) What would be the advantage(s) or disadvanatage(s) of giving each website it's own IP vs sharing a single IP?

2) Is one going to be more difficult to set up than the other?

3) Would it be better to use something like Webmin to configure the setup instead of trying to do it by hand, or does that take away from learning?

Thanks for any advice,
Chris