To open or contribute to an HSA you must meet certain eligibility requirements. Specifically:

You must be covered by a qualified high deductible health plan on the first day of the month
You cannot be covered by any other health plan that is not a qualified high deductible health plan, including spouse’s health insurance
You cannot be covered [...]

HSA contributions are based on your insurance coverage and age. For 2009 the limits are:

Single accounts (only one person covereed on the health insurance policy)—$3,000.00
Family accounts ( multiple people covereed on the health insurance policy)—$5,950.00
Additional contribution for account holders who attain age 55 by December 31, 2009—$1,000.00

Contribution tips:
 You have until April 15 to finalize your [...]

Is an otherwise eligible individual who has access to free health care or health care at charges below fair market value from a clinic on their employer’s premises eligible to contribute to an HSA?
An individual is not prohibited from contributing to an HSA merely because the individual has access to free health care or health [...]

You may use your HSA for long term care premiums provided your policy meets certain requirements and you stay within the allowable premium expenditure limits.In order to spend money from your HSA on long-term care, your long-term care insurance contract must:

Be guaranteed renewable;
Not provide for a cash surrender value or other money that can be [...]