I switched from a P/S to a GF-1 and the learning curve is minimal. You can use the GF-1 like a P/S if you want, as there is an AUTO mode that handles all the settings for you. The manual settings are really easy to access and simple to figure out.
I've used the camera on many vacations, and I think it is a really good camera for this type of use. It is not as small as the P/S, but it can take much better pictures. It is not as bulky as SLRs either, so you won't feel like carrying the camera around is a burden. Another plus is that it takes pretty good video with a push of a button (again great for vacation if you need quick video shots).
Like others have pointed out, I think the weak point of the GF-1 is in the stabilization. There is no stabilization in the camera, so night shots are a challenge. I have been getting around this by setting the camera on something nearby (using as a stand), but it would be nice to be able to take more stable shots holding the camera in my hand.
I think the new GF2 is geared more towards women. Seems like they are trying to make it more like a P/S and eliminate the manual controls. There seems to be no performance upgrade, so I think I will stick to my GF-1 for a while, as I really like the manual controls.