Hi Ricci, Ian & All,
IAU Circ 9002 records that 2008 X2 is identical with P/2004 CB, which is an intrinsically faint comet with a very short 5.04 yr period.
Ephemeris here:
http://www.cfa.harvard.edu/iau/Ephem...ts/2008X2.html
Which appears to indicate it might reach about mid 17th magnitude ... not much of a show really.
Sorry to be a party-pooper ...
Best,
Les D