I don't think we should focus too much on merchant adoption. It never really seemed to mean much for bitcoins price, and like others have mentioned, at best it will be the merchants currently accepting bitcoin that will begin to also accept bitUSD.
1) Merchant adoption in bitcoin results in merchants having to sell the bitcoin immediately, to avoid the volatility. Whereas with bitUSD, they dont. So merchant adoption for bitUSD should be more beneficial to us.
2) Merchant adoption of bitUSD use means that there is more demand for bitUSD to exist -> more bitUSD existing leads to increased BTS market cap to support it.
Our situation is a bit different than bitcoin's. Rather than adoption resulting in bitcoin sales, for bitUSD adoption results in greater demand for the asset that backs bitUSD, which is BTS. Bitcoin doesnt have anything analogous to this.
3) Pushing merchant adoption is important because it highlights one of our main advantages over bitcoin - the price stability.
4) By getting merchants to adopt bitUSD, we are building our own market, our own user base. We are growing the size of the pie that currently uses digital currencies, rather than only trying to take it from bitcoin.
5) Actually being used is one of the most important things for maintaining a high market cap. Bitcoin actually gets spent. Litecoin and Dogecoin actually get spent, some places. Ripple is actually being used by a couple banks. We want our main use case - bitUSD, to get used a lot as well.
Of course, bitUSD's use case as a savings account is also very valuable, and should and is being worked on.
Recruiting of developers of other projects to work for bitshares as a paid delegate is also very valuable.
We can do all these things at once.