Achievements in profile page?

Just found out we con now add a new content in profiles pages on 3.0 : "Achievements"

I was unable to understand how it works... I'm I missing something?

Display more members in each page?

I have been looking for this feature over and over...

¿Anyone could guess a hack to display more than 24 members in each page of members?

That would be great for my community. I need to be able to show all of the members of a group in a single page.

I t

¿contact form for my members?

Hello. I wold like to implement the ability for visitors to send a message to a member through a contact form.
My site is showcasing different photographers, and I would like a simple way for people to contact them without showing e-mail adress of the

Can I limit number of Photos uploaded?

Hello to all this community. Just a quick question I could not figure out alone: Is there a way I can limit the number (And saize) of uploaded photos by the members of my ning 3.0 network? That would be extremely useful in order to reduce the memory