Amazon UK has the link for the Chaplin Keystone Collection from BFI Video Publishing, up and running. You can currently sign up for an email alert when the collection goes on sale. The BFI PAL edition, are in 2 discs and according to the latest information, does not include outtakes as extras.
UPDATE August 25, 2010 - The USA Flicker Alley release of the 4 DVD set of Chaplin at Keystone will release in Oct. (either on 26th of before). Pre-order special with free shipping on now at Flicker Alley. LINK
The USA version will be released through FLICKER ALLEY, but it currently doesn't show any Amazon links on the USA site. So we are getting closer to having these being available! I can see lots of these under the tree next some year! (Note - Keystone ASIN: B002EAKWDO)
Checkout FLICKER ALLEY site for bonus clips of several currently release silents films, including the Valentino Collection, J'Accuse and Douglas Fairbanks. Also, check out the BFI site for more about the restoring of the Keystone films.
See comments for more information on this long awaited collection.