Last Monday evening Callie led a guided loving-kindness (mettā) meditation. The approach to developing mettā that she drew on comes largely from a method taught by Bhikkhu Sujato.
Those who would like to hear Bhante Sujato guide mettā meditation in this way will find an audio recording of it at: http://www.dhammanet.org/unconditional-love-part-2.
To listen to his series on this theme go to: http://www.dhammanet.org/dhammatalks/unconditionallove. Many more of his Dhamma talks can be found at: http://www.dhammanet.org/.