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A major barrier in the development of large-scale quantum information processing in diamond is the connection of nitrogen-vacancy spin registers. Given that diamond is expected to be an ideal spin transport material, the coherent transport of spin directly between the spin registers offers a potential solution. Yet, there has been no demonstration of spin transport in diamond due to difficulties in achieving spin injection and detection via conventional methods. This article exploits detailed knowledge of the paramagnetic defects in diamond to identify novel mechanisms to photo-ionize, transport, and capture spin-polarized electrons in diamond at room temperature. In particular,  we explore how these mechanisms may be combined to realize an on-chip spin quantum bus at room temperature.