On my symbian phone (e90) there's a very useful workaround for the scarcity of poi's on Ovi maps.

In fact, on that platform quite fortunately Google maps and Ovi maps can use the same format for preferred places. So, I look for what I need on Google maps, then when I find it I save it as a preferred place, and re-open that on Ovi maps.

I hope we are going to have Google maps on the N900, too, and that the same trick can be applied.

Otherwise, it would be an interesting development project to implement