Normally I would refrain from commenting in a thread like this, but tonight I feel compelled to offer my opinion based on my observations.
IMHO, two emotions showed from Lee today despite his best efforts to suppress them.
One was sincere and deep grief at the loss of his niece. He started off his statement with a thanks to everyone who had a role in making today a special day. It was a special day for Caylee, not KC, and he was thankful for it. He adds later "Today is the day to remember. Today is the day to pay tribute." Certainly words for Caylee.
The final passage of Lee's statement - and his actions at the podium - show just how deep that grief goes. Yes, to many of us (myself included) I was initially taken aback by the use of "CMA" rather than "Caylee". But then I thought of all the memorials I have been to and all the times I have seen a speaker break down when mentioning the deceased's name, and I believe Lee said her initials as a coping mechanism and a means to get through what he had to say.
He is incomplete...broke. Each day she continues to teach him about life, about the way it should be lived. She gives him the ability to be strong and allows him to be weak. He has not been able to hug her, tell her how much she means to him, he misses her, he loves her, he is proud of her...and hopes she is proud of him. He is talking about one person here, not mixing messages to two people. In the context of the ceremony, his final words only make sense as grief for the loss of Caylee.
The other emotion I saw, both at the beginning of the ceremony and during the middle of his statement, was anger. I believe this is directed at KC. He sends that one not-so-coded message out there that someone out there has answers, but they need to fill their heart with two missing elements: compassion and truth. And when filled, they need to allow their conscience to speak for them.
One does not go from a message of anger like that to suddenly grieving for missing the very same person. Why should he not be angry? She was a liar and thief. She implied or told at least some friends that he tried to molest her (I put that right there with George's stroke and Cindy's intent to sign the house over to her). And she killed his niece and showed callous indifference to the fact she was missing / dead. Not someone who would inspire words of pride and a desire for a hug at Caylee's memorial.
Notice that Lee was the only one of the three not to ask for some level of compassion or forgiveness or to say something nice about KC. He did not even refer to her directly.
I think Lee's promise to Caylee was to ensure justice is served, despite the fact it was his sister and Caylee's mother that was involved. To ensure this will take strength and courage on his part, but he made a promise, and he is hoping Caylee is proud of him working to keep that promise.