定制 jabber.el的通讯录 即朋友列表 的颜色。
M-x jabber-customize
-> Jabber Roster group
-> Jabber Roster User Online face 等。
设置完成后，.emacs 有如下更新
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(jabber-roster-user-online ((t (:foreground "green" :slant normal :weight bold)))))
原始的设置，在线是蓝色，在我的黑背景下快看不出来了，而不在的看起来更明显。
现在改为 在线的朋友为 粗绿。
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之前google了才半天，没找到答案。
看来太简单。