Data sets for historical sea level estimates I am looking for data sets for historical global sea level estimates. How would I go about doing this the best way? Are there any publicly available resources for this? 

The timespan I am looking at are the following: Preferably from 300 000 - 200 000 years ago to today, or from 15 000 - 10 000 years ago to today.
There are a number of publicly available proxy records for sea-level/temperature curves, I'd start with Google Scholar if you want refereed articles but a straight Google search can give you good results if you use the right search terms, like "sea-level over time" gave me some useful results; I'd recommend the Wikipedia result as most useful to you.