Matt/Sam/Andy. The warning that I raised also existed in 2.0.1 so unless its really obvious and simple to fix, I say hold off!
Here's an excerpt from me just installing 201:
Installing SilverStripe...
I am now running through the installation steps (this should take about 30 seconds)
If you receive a fatal error, refresh this page to continue the installation
# Creating 'assets' folder...
# Creating 'mysite/_config.php'...
# Creating '.htaccess' file...
# Building database schema...
# Waiting until the the database is created before compiling the manifest
Warning: None of these templates can be found: ErrorPage.ss, Page.ss, ContentController.ss in /sites/dev.silverstripe.com/smagnusson/sigtest/silverstripe-v2.0/sapphire/core/SSViewer.php on line 53
# Populating initial content and administrative account