Just a few tips from me:
What mnml.nl first really needs is an outlined plan of what has to be done and the roadmap to do it.
I have helped in the past (and tried) to do the programming on mnml.nl. I already made a custom cms including newsletter system, however this never got finished (and is already hopelesly outdated) due to the absense of structure on the project, which has also a lot to do with my lack of time!
I really think mnml.nl can be a great site, but it really needs overall project-management to get everything going and to keep oversight of the whole thing because of the ambition that everybody has on this.
Just asking for cool features like "better search" etc just won't do it.
This all sounds very corporate (i know
but really, if you take a step back and think about what needs to be done: netlabel, full news section, party agenda, maybe user personilzed stuff like user-agenda, blogs etc you have to agree that it's not just a thing to build in a weekend or a few spare nights (at that point i had to let this project go)
My suggestion to whoever will pick this up is to do it in the following steps:
1) do a full inventory on what needs to be done globally
2) make a functional plan
3) pass the plan to the designer and make the design
4) make a roadmap for the different stages and which features will be done with each phase of the site. it's over-ambitious to release everything at once with a project like this.
5) get programming and have fun!