Our interview went really well this morning. It lasted all of about 7 minutes. The IO called us in, told us to stand, raise our right hand and take the oath. Then, he asked us where we met, and then asked for proof of marriage documents. I gave him our marriage license, our joint bank account statement, our mortgage statement, the warranty deed for our house, our car insurance with both our names on it, our life insurance with each other as beneficiaries, and was pulling out more stuff, when he told me he'd seen enough, he didn't need to see more. I asked him if he wanted to see our pictures and he said no. He asked us no further questions, and told us our case was approved pending namecheck.
He also said that in my case, the most likely reason why namecheck was incomplete, is becuase my case has been processed very fast (it's been less than 3 months since I submitted the paperwork). He said he expected my namecheck to clear soon (in about a month he said). He did also say that sometimes people get stuck in namecheck for no reason, but he felt this should clear within the next month. Also, for those curious, he said they check for whether namecheck has cleared or not for all their cases once very couple of days.
Anyway, my interview was very easy, thanks to all the prep work I'd done as a result of reading the posts here. Thanks all.