Syria: A new massacre in Homs?

The Guardian reports growing concern that Syrian army units surrounding the rebellious city of Homs are planning a masive attack and massacre.  It quotes, for instance, Syrian blogger @Maysaloon:

I think we’re either going to see a massacre in Homs, or a war involving #Syria at some point. This situation cannot last for long.

Here, also from the Guardian, is an informative map sketching where and when protests in Homs have taken place during the revolution:

Meanwhile, the NYTimes points to severe splits between the opposition Syrian National Council and the Free Syrian Army, a rebel force operating from across and around the Turkish border.