I guess that this makes it official:

Vatican Response on Possibility of Ordaining Homosexuals to Priesthood

P.S.Kevin Miller over at De Virtutibus also blogged on this.

I found the following remarks in his comments. I thought that they were worth quoting.

Note carefully: this is a prudential judgment, not a matter of doctrine. In other words, the letter does NOT say that there are theological reasons per se for not ordaining men with same-sex attraction.
Robert Gotcher

I do however want to add the following caveat:

Stating that this is Rome's prudential judgement is different from stating that it remains an area open to discretionary judgement. Canon law itself is based on the prudential judgment of Rome.