WordPress Trac says: Milestone 2.5 Due in 22 years (04/01/30). Read on for more details.

Completed: 75%
Closed tickets: 726
Active tickets: 244

Administration: 227/310
General: 333/456
Optimization: 36/38
Security: 9/11 (a ironic number, considering recent security issues with WordPress)
Template: 29/51
TinyMCE: 49/53
WordPress.org: 1/1
XML-RPC: 16/22
i18n: 26/28

The due in 22 years, in case you haven't already realized , is a bug in Trac. Where it is showing the last possible date, when no date has been set. In reality no date has been set, awaiting RC feedback.

Update: WordPress 2.5 has been released.