Charles,

Regarding setting up a section on the Indic Texts Wiki: please do feel free. You will need to register, but I don't think you need to be a TEI member to register. 

I think the DHARMA project has plans to create a list of such symbols, which would presumably be represented by the <g> element in EpiDoc editions. Whether and how those symbols would be displayed is a different matter. I suppose the options are (a) represent the symbol as it is found in the document, with an image; (b) represent the symbol with a "standard form" (e.g., the "Jain Om" included in the Unicode standard; for symbols like bhale, this is more complicated); or (c) represent the symbol with something like "(bhale symbol)," making no attempt to copy its form. Does anyone have preferences or experiences with any of these options? 

Andrew