Recent cosmological data sets have shown tantalizing hints that our current model of Dark Energy may be too naive. New experiments like CHIME are poised to address this question through 3-dimensional maps of structure using the 21cm emission line from neutral hydrogen contained in abundance in galaxies. However, success hinges on our ability to remove bright foreground emission, which requires improved calibration of the instrument and new techniques in foreground removal. In this talk, I will describe results from the CHIME experiment that show a significant detection of neutral hydrogen in distant galaxies, highlight recent progress in calibration since those papers for our ultimate goal of improved measurements of Dark Energy, and discuss future directions for the analysis.