i think we need at least one financial institution, or investment group, that can get into the business of taking fiat, creating bitfiat, and do the reverse transaction. i don't see a simple on/off ramp doing it bc of the collateral maintenance issue; it'd take serious liquidity and adept management of positions for them to figure out a business model that can sustain a profit.
this could be possible with a viable bond market. i've just seen some interesting proposals for using the reserve fund to create Bitshares Treasury bills/bonds that pay out fees to holders; an asset like that could solve the business model problem.