Today’s Church Times carries a news report by Pat Ashworth Accuracy of briefing paper on ACNA challenged.
This mentions a press release from the American Anglican Council, which you can see here: AAC Tracks Episcopal Church’s Canonical Abuse – Plight of Orthodox Anglicans.
This article from almost a year ago may be useful: 16 February 2009 ACNA publishes statistics.
And there is this one from earlier, 12 December 2008 ACNA: 700 congregations?
Also, 12 December, revised 19 December 2008: church press covers ACNA
And there are other articles from last year:
June: more about ACNA