geocoding from tiger shape file

I am geocoding addresses from Tiger line data which I extract from
Tiger files and place into a sql db. In preparation for the release of
the Tiger data in shape file format I have written an application to
extract the address segment data and coordinates from shapefiles. I
have been using the ESRI Tiger shape files for testing. However, I
think the coordinates in the shape file are stored in a different
projection than those in the Tiger Line files considering that the
points I have extracted from the shapefile are 10-15 miles off from
the points in the Tiger Line files. I amexperienced developer but
somewhat of a beginner at GIS. I understand the concepts but have very
little experience with dealing with projections. If anyone could point
me in the right direction I would appreciate it My intent is to
extract the data, apply the transform and then save the data in a db.

Thanks.

Geodetic Model: Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222

Projection is transverse mercator.

What are you using?