I’ve added a new small feature to the embed.ly plug-in, now you can pass along parameters specific to a particular embed, e.g.

{% embedly http://soundcloud.com/battles/ice-cream, color: FF11FF %}
{% embedly http://soundcloud.com/workit/the-drums-money, color: FFCC00 %}
{% embedly http://soundcloud.com/modularpeople/the-avalanches-since-i-left-you-stereolab-remix, color: 00CCFF %}

will produce

Hooray for colorful SoundCloud players!