At the moment, the only way tho start kcm_telepathy_accounts is to run it using kcmshell4, but it should be shown in system settings.
SVN commit 1167189 by davidedmundson: BUG: 246218 Show the Accounts setting KCM Module in SystemSettings. M +2 -0 kcm_telepathy_accounts.desktop WebSVN link: http://websvn.kde.org/?view=rev&revision=1167189