I'm especially fond of the lipid raft and of the mitochondria (mitochrondrium?). The Golgi apparatus would make a very nice designer lamp.
There've been a fair number of animated movies about insects-- I wonder how long till we get movies set in cells, no doubt with wise-cracking organelles so that we can be reassured that our innards are just like us.
Link indirectly thanks to GeekPress. The original link is at Lifeboat.com, but it was easier to embed from youtube.