I really like #66, but the 'cloud' seems a bit too close to the text?
took me a second to get #67, and at first i didn't like it, but not that i see the clouds, i like it... maybe if the 4 and 8 were separated a bit? the eight looks 'messy' compared to the four, maybe because of proximity?
nice entries, thanks for the submissions, hope to see more!