I have a Sassy Psycho Boost, Pokemon XD, Lugia (relatively superior IVs, level 50) ready to find a new home in return for legit Jirachi with relatively superior IVs (or acceptable IVs with a modest or bold nature).
Fair disclosure: this pokemon could be a clone. In return, I don't mind a Jirachi with questionable provenance (aka GTS); so long as it is from a legit event. PM me if you're interested. This post will be kept up-to-date.
EDIT: 15 January, 2012: Found a Jirachi. Thanks 'Fogell!