I happen to like both the logo and the flag. the logo invokes the symbolism of venn diagrams, and the arrows as perhaps the four directions. the flag symbolizes humanity and the relationships between people, and of course has the name on it. i like both, but would welcome the idea of more symbols too.
I remember someone on jbotcan posted a bunch of alternative lojban logos i really liked that didn't have such an unsighly bold clash of bright red and blue. They even included "a logical language" in every combination of english, lojban, and lojban in tengwar (major props for that!).
I was wondering if those were uploaded anywhere else or if whoever created them could upload them somewhere else. I think it was made by whoever made that alternative homepage for lojban which looked amazing!
Also, what is the significance of the current logo? I personally don't realy like it...anybody else have thoughts on the matter?