I am personally quite happy with the progress that I could make on DotSVN.
Using this library, it is currently possible to do the following operations.
Open an FSFS SVN repository
Enumerate its contents
Retrieve the properties collection of each element
Get the contents as a stream
I have also added three sample application. One is a console based application. The second one is a WinForms GUI sample that is very similar to the TortoiseSVN repository browser. The third one, is a browser based SVN repository viewer using Yahoo UI controls.