This Mod Adds to your SSI.php a function that allows you to get all members from a membergroup. This is great for people who run Clan, Guild sites or just need a roster of members..
This was Created to Search Regular Groups and Not Post based Groups.

Usage:
ssi_membergroup($groupid = 1, $additional = 0, $sort = 1, $sortorder = 1, $output_method = 'echo')

Notes:
Group ID 0 Can not be selected, It will default to 1 (admins)..

SMF 2.0
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To all those who are wondering where this mod went. This is a new SSI Feature in 2.0

Looking at this function may help you.
// Get all members of a group.
function ssi_fetchGroupMembers($group_id, $output_method = 'echo')

This mod also contains more information than my mod by using loadMemberContext to pull a lot of the user information.

SSI_Membergroup.tar.gz 1.94 KB