You can't retrieve the results of a report without you use the Analytics API. If you want to participate in the pilot, let me know and I will submit your request.
Once in the Pilot, you use a REST endpoint passing in the Id of the report. You will have two endpoints-- a describereport endpoint and a runreport enndpoint. What is returned from describeReport is a JSON representation of the metadata for the report (describes the dimensions and facts and such) and from runReport a JSON representation of the data.
Once you have the data you can do with it what you will. The report data is only available at the summary level and for the pilot only summary and matrix reports are supported.