Ikea's Anes bedside table ($49) comes with castors and may be a good option. More below the jump...
The CB2 peekaboo clear c table ($179) has wheels. We've also seen CB2's runway table with wheels ($99.95).
Readers: do have any experience with these rolling end tables? Do you have any other table recommendations?
[Shown here is the Ikea's Anes bedside table.]