  Recently, Coulomb blockade physics was observed at room temperature in a
carbon nanotube single-electron transistor (H. W. Ch. Postma, et. al., Science
293, 76 (2001)). In this work, we suggest that these devices may be promising
for studying the Kondo effect. In particular, they could allow for a detailed
investigation of the 2-channel Kondo fixed point. Moreover, fabricating a
similar device in a short nanotube could be promising for studying the effect
of a magnetic impurity in an ultrasmall metallic grain. Experimental signatures
of the Kondo effect in these systems is discussed.
