Warner Bros has just sent over the details for the Disc 1 exchange program. They mention that the disc will be available after January 30th, which means it should be available now. The replacement is only meant for people that received a defective disc, and shouldn't be needed by the majority of people. If your pilot episode skips around the 1 hour, 31 min mark then you should contact Warner Bros for a replacement disc.
Notice regarding The Flash: The Complete Series DVD set:
Warner Home Video is advising consumers who purchased The Flash: The Complete Series DVD that Disc 1 may be defective. In particular, the pilot episodes may be skipping and/or freezing at approximately 1hr 31minutes.
For any consumer who is experiencing this problem with Disc 1 and needs to obtain a replacement disc, please contact Warner Home Video at 1-800-891-1311 so that a self-addressed stamped envelope can be sent to you for return of your current Disc 1. Please note that the replacement Disc 1 will be available after January 30, 2006.