There is a good report in allafrica.com about the resumption of talks in Zimbabwe.

On Monday South African President Thabo Mbeki again met the three main protagonists. Apparently, he presented them with a document, which is apparently “long and technical” according to another source, that was designed to serve as the basis of an agreement. No deal was reached, but there is at least some grounds to suggest that an agreement is a little nearer now than it was when the talks collapsed a couple of weeks ago. That said, when the talks were due to resume on Tuesday morning, only Morgan Tsvangirai was present.

One way round the impasse is the idea that a new constitution will be drafted sooner than had been envisaged. However, the devil is always in the constitutional detail, so this idea begs the question of how future constitutional negotiations will be conducted and whether agreement will be forthcoming then.