We have delayed CiviCRM v2.0 code freeze (and hence alpha/beta/final) dates. This was primarily because of other commitments, specifically developer boot camps and our combined travel schedules. We expect to have the code freeze in the second week of January (01/07/2008) to be followed by alpha, beta and final releases spaced out over the next six weeks.
You can see the current schedule and features for CiviCRM 2.0 here. The list of bugs that still need to be resolved can be found here. Note that quite a few of the issues are in active QA and/or filed very recently.
We apologize for this further delay, and do hope that we will not slip the dates any more. On the flip side, we think v2.0 has some pretty cool scalability and extensibility enhancements.