The possible auctioning of single character domains like a.com, i.info, 4.mobi looks a step closer with ICANN seeking expressions of interest from Auction Design Experts.
“ICANN is seeking expressions of interest from entities experienced in developing and managing auction processes. ICANN has identified several areas where auctions might be an appropriate tool, such as the efficient disposition of data from terminated registrars and registries, the allocation of single-character second-level domain names, and perhaps, resolution of contention between competing commercial applicants for identical strings in the application process for new generic Top Level Domains. …. more here