  We have observed the millisecond X-ray pulsar SAX J1808.4-3658 on three
occasions during its 2000 outburst with the BeppoSAX satellite. The source was
highly variable and erratic during this outburst, and by coincidence we
obtained data only during times when the source had very low luminosities.
During our observations, we detected four faint sources. The source closest to
the position of SAX J1808.4-3658 is still ~1.6' away. This source can only be
identified with SAX J1808.4-3658 if we assume that the BeppoSAX positional
reconstruction is not completely understood. We also reanalyzed a BeppoSAX
observation taken in March 1999 when the source was in quiescence and during
which the source was thought to have been detected (Stella et al. 2000). Based
on the similarities (position and luminosity) of this source with the above
mentioned source ~1.6' away from SAX J1808.4-3658, it is possible that they are
the same source. If this source is not the millisecond pulsar, then during all
BeppoSAX observations of SAX J1808.4-3658 (the 2000 outburst ones and the 1999
quiescent one), the millisecond pulsar was not detected. A reanalysis of the
ASCA quiescent data of SAX J1808.4-3658 (Dotani, Asai, & Wijnands 2000)
confirms that during this observation the source was securely detected in
quiescence. We discuss our results for SAX J1808.4-3658 in the context of the
quiescent properties of low-mass X-ray binary transients.
