MINEOLA - Nassau County legislators held a public forum today to discuss a $40-million bond covering property tax refunds and major service cuts. Hundreds attended the meeting in Mineola, which was prompted by threatening letters sent out by County Executive Ed Mangano (R-Nassau). The letters, mailed last month, indicated that more than 40 social services may have their funding cut and contracts terminated. Long Beach Reach, a substance abuse counseling center, and the Harriet Eisman Community School, also in Long Beach, are among the programs on the chopping block. Mangano blames the dilemma on Democrats who refused to sign off on a bill to borrow the necessary money. However, Democrats say the cash-strapped county should just reallocate existing funds.