Neither Adobe Creative Suite 1 or 2 are 64bit. One way to tell is how much memory the application can address. If it's limited to 3.5 GB or less, then it's a 32bit application.
In truth, not all applications will benefit from going 64bit, so you can expect that at least some applications will be 32bit for the time being. And as for the applications that can benefit from being 64 bit, you'll start to see them coming out over the next year or two. Remember that a 64bit application has a limited audience right now, so there has to be enough reason for them to release a 64bit version.
And you will most likely see the "Pro" applications go 64bit before other applications. (Final Cut Pro, DVD Studio Pro, Photoshop CS#, Logic Pro, etc.)