Ok, so I just watched the season finale of How I Met Your Mother. This was the 5th season. We have yet to meet the mother. At the end of the 4th season finale there was a scene where Ted was teaching a class and said something to the effect of, "as you know kids, your mother was in that class." And then the whole following season, no freaking mother. There was an episode this year, one episode, where Ted dates this girl who is the mother's roommate. But he never meets the mother. And they never mentioned it again.
I'm not gonna say that this is at Lost levels of frustration, but I am officially disappointed with How I Met Your Mother. We must meet the mother. We must. You guys have already used a lot of the cute couple material on Lily and Marshall, so I know you can do it. There's a whole relationship between meeting, dating, engaging, marrying, and so forth that is ready to be explored. Please, season 6, let's meet the mother. Thank you.