Transparent data encryption
External key management
Data Auditing
Hot Add CPU
Database Mirroring Improvements
Transparent failover for Database Mirroring
Automatic recovery from page corruption
Log stream compression (Database Mirroring)
New Performance Counters for Database Mirroring
Declarative Management Framework
Server Group Management
Streamlined installation
Enterprise System Management
Performance Data Collection
System Analysis
Data compression
Resource Governor
Query Optimization Modes
Extended Events
Logging Improvements (Minimal Logging = log only what is necessary for rollback)
Entity Data Model
Language Integrated Query (LINQ)
Visual Entity Designers
Entity Aware Adapters
SQL Server Change Tracking
Synchronized Programming Model
Visual Studio Support
SQL Server Conflict Detection
BLOBS in SQL SERVER 2008
FileStream data type
Remote BLOB Store API
Integrated Full-Text Search
Sparse columns
Large user-defined types
Date/Time Data types
LOCATION data type
SPATIAL data type
Add to that:
INSERT INTO MyTable (ColX,ColY)
VALUES ((SELECT Top 1 ColZ FROM MyOtherTable),
(SELECT Top 1 ColW FROM MyOtherTable));
Unconfirmed yet: