by Greene et al. (2008) and Jiang et al. (2011a) indicates that the majority of the host galaxies with disks are likely to contain pseudobulges; the rest resemble spheroidals according to their position on the fundamental plane. Very few live in classical bulges. Moreover, the [$M_\mathrm{BH}$]{}–$L_{\rm bulge}$ relation flattens out at the low-mass end, and on average the bulge luminosity is larger by 1–2 index at fixed [$M_\mathrm{BH}$]{} (Greene et al. 2008; Jiang et al. 2011b).

The low BH masses and high accretion rates that generally typify the low-mass AGN sample also provide a unique opportunity to probe accretion processes in an under-explored regime of parameter space. Especially interesting is the broad-band spectral energy distribution (SEDs) of these systems. Unlike quasars, which have luminosities that far exceed that of their host galaxies, the SEDs of Seyferts, particularly those with low-mass BHs, can be strongly contaminated by emission from their hosts. Observations with high angular resolution are absolutely essential to decouple the AGN from the host to construct proper nuclear SEDs. In spite of these challenges, studies so far already suggest that low-mass AGNs may possess unusual multiband properties, including for the tendency to be very radio-quiet (Greene et al. 2006; 