The Society of Biblical Literature has recently published a Jobs Report for Theological, Religious, and Biblical Studies based on 2011—2012 data. You can download it as a PDF file here.
A key finding is that the number of academic positions increased markedly from 2010 to 2011, and plateaued in 2012.
A typical new position is a full-time tenure-track appointment. However, the report indicates that non-tenure-track positions are probably under-reported.