[there]

noscript natively supports blocking embedded things with a click-to-activate interface, so if you're using noscript there's no need for flashblock.

[bobds]

The thing I like about NoScript is that you can set it to block everything, even on trusted sites. You have to click the placeholder to make it load, or if there isn't a placeholder (web fonts, hidden flash embeds) you have to look at the Blocked menu.