Magento is the great hope for the opensource e-commerce community. And even for closed source people
The features requested by J.o.h.a.n are really cool. The print catalog function should also have options for which fields to include. E.g: Hide price, Show Description etc.
Also generate by Id would be cool.
As an eventmanagement agency, we need to print catalogues all the time, some with prices some without. Some with our own branding and some with brandings of other agencies. Magento has great potential, and we will definately be using it when it comes out as 1.0
Keep on Varien and communitiy: Gogogo Magento!