You are very confused on the terms you use. Social Security benefits are not
unemployment payments. You cannot draw unemployment while you are still
working.
As for Social Security benefits, if you begin drawing benefits anytime
before your normal retirement date for full benefits, at least 65 years and
10 months for you (depending on when you were born) you lose $1 in benefits
for each $2 you earn above the limits. Those limits for 2007 are $12,960/yr
or $1,080/mo. For 2008 they are $13,560/yr or $1,130/mo.
You should also take into account any potential tax that may be levied on
your SS income because of your total income from all non-exempt sources.