tedster - 3:44 am on May 10, 2011 (gmt 0)
It's not cloaking as far as I understand it. If you don't use the hash-bang (#!) convention that Google introduced, then you most likely have content that Google cannot currently index. That's a lot different from serving content to Google that only Google can see (cloaking).
Added to that, in recent years Google spokespeople usually talk about "deceptive cloaking", not just "cloaking". There are all kinds of non-deceptive situations where googlebot gets something different than another user agent, for example, geo-location within a site might serve different content according to regional differences. That is also not deceptive cloaking, as long as the IP googlebot visits from sees the same thing as any other IP from that region.