That was a weird episode, but I like weird. They clearly wanted to try something different and cap it off with something a little "meta" with the singing. That made it all the better. The way Ted was talking to the mother though, made it sound like she's dead and he wished he could spend a little more time with her.
Mr Light wrote:
We learned a ton more about her too! If he's meeting her in 45 days I don't see how they could possibly not show her in the finale... I'm going to be really pissed if they don't...