Just like many other artists, Ayu left a message at the official website of 'm.c.A.T' (A musical act with whom Ayu made the pre-avex song called "A")
浜崎あゆみ
m.c.A･Tさんとは、私のファーストアルバムでの楽曲プロデュースやavexの企画アルバムで一緒に曲 を作った思い出があります。懐かしいですね!(笑)
2007年の再始動、頑張ってください!
I think this is basically what she says:
m.c.A.T; Before my plans of making a debut-album with Avex, we produced a song on which we worked together. Those were the days, don't you think? (Laughs)
As for 2007; keep it going!
Source: http://www.avexnet.or.jp/mcat/news/ (as noticed by Yasu)