eWeek provides confirmation that Mac OS X 10.4 (Tiger) will be released on April 15th, 2005.
Sources told eWEEK.com that Apple plans to make copies of Tiger available in its own retail stores as well as through independent dealers by April 15, with the official announcement of the product coming earlier in the month.
This provides confirmation to a previous report by ThinkSecret indicating the same.
More information on Tiger can be found at Apple.com.