As of now, images of structural formulas have to be created using third party software and converting the output to SVG or PNG. With MolHandler[1] we aim for a solution capable accepting and rendering chemical markup files and providing a web-interface for easily creating, modifying and re-mixing formula files. This does not only make re-using existing structures easier and simplifies creation of structures, moreover it allows Wikis to adopt a unified style for rendering these structures, makes structures searchable (sub-structure search) allows pulling, pushing and verifying data from big databases like ChemSpider and PubChem. In the future we plan to enable support for spectra and more sophisticated file formats to have at least some minimum support for chemistry-related Wiki-works.
I am currently looking for features you would find helpful and therefore created a test wiki[2] at which you can create user accounts. A non-exhaustive list of features is available for raking by drag&drop. Or just write here what you at least want, what you would like to see soon and what is less important to you.
-- Rillke
[1] https://www.mediawiki.org/wiki/Chemical_Markup_support_for_Wikimedia_Commons [2] http://mol.wmflabs.org/