In the course of talking to the press about Tuesday's Walk In My Shoes event in Dublin, Adam Clayton also spoke briefly about U2's album plans. According to the Irish Independent, Clayton said U2 is working on the new album now:
"We're in the middle of it at the moment. It should be finished by the end of the year."
This may cause some discussion/exasperation in forums and such because having an album finished by the end of the year isn't the same as what Larry Mullen and The Edge have previously said, when they talked about the album being out by late summer/September. But I wouldn't concern myself too much with it at this point. If future comments echo what Adam said, then it may be time to get concerned.
As always, we're keeping track of all of this on our New U2 Album page.
UPDATE: There's a Hot Press article about yesterday's events, which paraphrases Adam as being "confident of an Autumn release for their new record."