At first: many thanks for embedding CircuitLab! It's cool, easy to use, et cetera, et cetera. Major improvement of the site.
Here's a little feature request: can we have an electrolytic capacitor as well? Most of the time, I distinguish electrolytic and ceramic capacitors in my circuits - this increases readability. However, the CircuitLab tool doesn't have an electrolytic capacitor.
I hope this is on topic here, but perhaps I should ask CircuitLab directly? Their main editor doesn't have an electrolytic capacitor either.