Hello,
On RC1 i just can't find how to activate the "Request Member Group" option in members profiles.
Thanks!
In admin area go to members - Membergroups - Edit Membergroups then click the group you want to be... requeastable and in group type check the radiobutton that specifies "Requestable (User may request membership)", then make sure it is set visible in visibility column and click save.
Once a group is requestable any member can go to their profile and go to modify profile - Join Groups (or i don't know wich is the option in english because i translated it)
Thanks a lot :)