I just finished a personal project of figuring out how to authenticate my Snow Leopard Macs against an Ubuntu 9.10 Linux LDAP server (running slapd 2.4.18) so that I could have centralized logins and home directories (using automounter/autofs). So I thought I'd share it with the community:

Backup Central - Snow Leopard, Ubuntu, LDAP & Automounter Step 7: Create a test user