Much of the modern renaissance in main-group chemistry has been driven by a desire to better understand and manipulate low-valent, low-oxidation-state and low-coordinate states of the elements. For silicon, a major landmark was the 1986 synthesis and structural chratacterization of decamethylsilicocene, Cp*2Si, the silicon analogue of a metallocene. Stable diaminosilylenes followed in a few years. Key developments in the twenty-first century include the synthesis and full characterization halfsandwich Cp*Si + cation 18,19 and, very recently, of the silapyramidane (Me3Si)4C4Si, consisting of a bare silicon atom atop a tetrakis(trimethylsilyl)cyclobutadiene base. The cyclobutadiene may be thought of as an aromatic dianion interacting with an Si 2+ cation.