retirement fund calculator

Can Anyone suggest an easy to use retirement calculator via the web? Any advice on the Vanguard REIT fund?

That is when to hang on and when to get out?

check out these sites for retirement calculators…..

http://personal.fidelity.com/planning/retirement/content/myPlan/index.shtml?imm_pid=1&immid=00129&imm_eid=e12647&buf=999999

http://www.metlife.com/Applications/Corporate/WPS/CDA/PageGenerator/0,4132,P14787,00.html?WT.srch=1&WT.mc_id=cs0592

http://apps.nasd.com/investor_Information/Calculators/nasd/retirementcalc.aspx

Ben Stein Talks Retirement — Part 1