No, by this date there is no way to get annotations from the Google Analytics API.
There is an open problem there.
http://code.google.com/p/analytics-issues/issues/detail?id=53
Feel free to ask a question in order to receive updates, but please do not answer it with the comment "Me too."
The problem was discovered in January 2010, and by this date there are no updates or comments from Google.
Googleβs internal policy is not to discuss public bugs and new features. We know that they know about this and other shortcomings of the API, and we know that they are working on it, but they will not provide any deadlines, so you should not wait for it in the short term.
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