I’m current on my mortgage, will a refinance under HARP help me?

Yes, A Home Affordable Refinance Program loan will help.  Most home loan years up to June 2009 were at interest rates between 5.0% and 6.75%. So lowering your rate will save a significan amount of interest, and likely lower your monthly payment.  See recent rates

However, you must be current on your loan to qualify for a HARP Refinance, and have had 0 late payments in the most recent 6 months, and no more than 1 late payment in the last 12 months.

It will help you – here’s an example:
Assuming the borrower’s current loan has a fixed rate of 5.80%. As 2012 rates have been in the mid 3% to low 4% range. A HARP Program loan would lower a $350,000 mortgage payment by around $450.00 per month.