IPhoto Bi-directional Sync between 2 Macs

[howardnow]

I have a new early 08 MBP laptop (Leopard) and a G4 tower (Tiger) using IPhoto 08.

When out of town I have added photos to my laptop. I have also added different new photos to my tower.

Is there a software way to update both computers to have the same photos?
I have heard the term bi-directional (my Palm Treo does this). In the case of my Treo, if I have new info in both my phone and computer, both will be updated to match each other. Now I need to do that same syncing concept between both of my computers for IPhoto (I do not have .mac).

Thanks in advance for your help!

 

[chrisandersen]

Do you have a mobile me account?

 

[howardnow]

No, I do not have a mobile me account (I called it .mac in my question).
I hope there is an answer to this problem.

Would IPhoto 09 act any different for bi-directional sync?

Thanks