So, I went back to my various notebooks. But, the one that starts around August 2006 has a gap from the end of LAConIV through Arisia 2008.
I finally found a notebook that picked up in Dreamation 2007, which was January. But, from there, it jumped to Origins 2007, skipping over March 2007, when Lunacon was held.
Possibly, I didn't take notes for that Lunacon. But, I did a con report for Boskone 2007, and it looks detailed enough that I probably took at least some notes for that. Boskone was February 2007, and not in the notebook.
I don't usually jump notebooks, and I'm not sure what was going on here.
This is reminding me of a justified critique of a Call of Cthulhu scenario where, even though the PCs found the victim's diary, other diary, and secret hidden diary, they hit a dead end because they neglected to look for his dream journal! Now, I can attest that this is not actually unrealistic, but the realism is misapplied. PCs should find the blasted clues unless there's a Danged Good Reason beyond "They blew the Spot Hidden roll that would keep the session from crashing to a halt."
And my notes are laughing at me.