  We describe a new RR Lyrae identification technique based on out-of-phase
single-epoch photometric and spectroscopic observations contained in SDSS Data
Release 6 (DR-6). This technique detects variability by exploiting the large
disparity between the g-r color and the strength of the hydrogen Balmer lines
when the two observations are made at random phases. Comparison with a large
sample of known variables in the SDSS equatorial stripe (Stripe 82) shows that
the discovery efficiency for our technique is ~85%. Analysis of stars with
multiple spectroscopic observations suggests a similar efficiency throughout
the entire DR-6 sample. We also develop a technique to estimate the average g
apparent magnitude (over the pulsation cycle) for individual RR Lyrae stars,
using the <g-r> for the entire sample and measured colors for each star. The
resulting distances are found to have precisions of ~14%. Finally, we explore
the properties of our DR-6 sample of N = 1087 variables, and recover portions
of the Sagittarius Northern and Southern Stream. Analysis of the distance and
velocity for the Southern Stream are consistent with previously published data
for blue horizontal-branch stars. In a sample near the North Galactic Polar
Cap, we find evidence for the descending leading Northern arm, and a possible
detection of the trailing arm.
