1 INTRODUCTION
2 OBSERVATIONS AND DATA REDUCTION
2.1 Optical and Infrared Photometry
2.2 Spectroscopy
3 ANALYSIS
3.1 Photometric Redshift Calculation
3.2 Reliability of Photometric Redshifts
3.3 Sample Subsets
3.4 The Effect of AGN on Photometric Redshifts
3.5 Reliability of SED Parameters
4 RESULTS AND DISCUSSION
4.1 Photometric Redshifts
4.2 Redshift Distribution of Unidentified SMGs
4.3 Simple Redshift Estimators for SMGs
4.4 Typical SMG SEDs
4.5 Stellar Masses
4.6 Dust Temperatures, Far-infrared Luminosities and Star-formation
5 SUMMARY AND CONCLUSIONS