NoMachine NX type software for Mac OS X?

[Hex Star]

Ok so here is my plan:

Install ldap on main desktop mac as explained here:
http://www.wickedlush.com/blog/2005/10/06/setting-up-ldap-slapd-on-mac-os-x-non-server-edition/

Configure ldap on main desktop mac and configure laptop to authenticate to
main desktop ldap as explained here: http://mattfleming.com/node/190

That will take care of being able to have the same desktop, mail, etc but it
won't take care of being able to add things to the desktop and such on the
laptop and having it be the same on the desktop, in particular when the
laptop is used and the desktop mac is not on. So for that after logging into
the accounts on the laptop and authenticating against ldap I'll go into
account prefs and make them mobile as detailed here:
http://mattfleming.com/node/190

This sound like a good way to accomplish what I'm looking for? Thanks! :)

P.S. In case you missed it...

Here is pretty much what I'm looking for:

My family wants to have one desktop machine that people can use as they
please, each person (except me, I paid for my own computer...and for good
reason :P) has their own account on the machine so that they have their own
desktop, home folder, itunes library, mail, etc. This is already done. Now
they want to expand to a laptop as well so that when someone is using the
desktop and someone else wants to use the computer as well it will be
possible for that to happen.

However they also want to be able to be on the laptop and be able to see
their usual desktop, mail, etc.

So my thought is that I could setup a remote access server on the desktop
computer so that people can use the desktop computer as they wish while also
allowing people on the laptop to login to the desktop mac at the same time
and pull up their own desktop and everything. NX seems to do this for the PC
and that is why I am looking for something functionally similar.