According to the White Paper, and everything else we have seen, the following benefits will not be included in the Universal Credit: 

Contribution-based benefits

• Contribution-based Jobseeker's Allowance
• Contribution-based Employment and Support Allowance

[Contribution-based benefits will not be part of the Universal Credit, but may be administered through the same IT system as Universal Credit]

Pension-age benefits

• Pension Credit
• State Retirement Pension

and these other benefits:

• Child Benefit
• Council Tax Benefit (click here for comment)
• Housing Benefit for pension-age applicants*
• Attendance Allowance and Disability Living Allowance
• War Pensions and Armed Forces Compensation Scheme
• Student Finance
• Community Care Grants
• Crisis Loans
• Bereavement benefits
• SSP
• SMP
• Maternity Allowance
• Industrial Injuries Disablement Benefit

The position of Carer's Allowance is uncertain, but the White Paper published 11/11/10 (Universal Credit: welfare that works) tells us that the Government is considering changes to Carer's Allowance to "provide clearer, more effective support for carers." 

*The wording of the White Paper implies that Housing Benefit for pension-age applicants will be rolled-in to the housing costs scheme that already exists within Pension Credit.