What is the state of the current Anville version from the CVS? The version I installed about two weeks ago has some undefined macros and i want to replace it. Is this a good idea or is it better to wait for a couple of days?

Is the current db-schema finalized and will I be able to update it to later versions without updating the schema, without testing and without the possibility of hiccups?

No.

Will the current CVS version work without spilling out errors and unhandled macros every few meters?

AFAIK, yes.

Do we need more beta testers willing to dig up problems and bugs and help us fix them in order to come up with a 1.0 release that merits that label?

Of course we do!