Yes, you can always use Fink to compile and install Fink. To do that you'll need the development tools. I don't know if the current tools work or if there'll be and update available for download.
I was able to run the devtools old installer successfully, but I haven't tested them yet. Moreover, I am not sure about the effects of the upgrade on the UNIX-based software already compiled and installed.
I'm hoping the new Developer tools will be available for download after a month or two (assuming I can last that long), because I'm going for the free visit to the Columbus Apple retail store. I seem to remember something similar with the original release of OS X.
As for wget being replaced by curl, I'm glad because I've found I like curl more. I installed with Fink about a month ago, just because I could, and at least visually, it is much nicer.