The PDF version of the 4Q 2006 Long Island/Queens Market Overview [Miller Samuel]  that I write for Prudential Douglas Elliman [PDE]  is available for download. I have been writing market reports for them since 1994. This market coverage is a relative newcomer to the series.
You can see the [methodology]) that went into the report.
You can also build your own custom data tables  using the aggregate report data (from 2Q 2003 through 4Q 2006). I plan on creating a series of quarterly market charts like we have for Manhattan .
…Sales prices in the overall market remained relatively stable, kept in check by rising demand and declining inventory. With the cash-out phenomenon waning as existing homeowners, who were not priced at market levels allowed their listings to expire. This has helped clear clutter in the market for buyers. At the same time, sellers appear to be more negotiable this quarter as the listing discount increase at the same time the number of sales did. Lower end price points like the condo market were generally stable but there was weakness in price levels at the upper end of the market, as evidenced by the North Shore and luxury sectors, which saw lower prices at the upper strata but, interestingly, some of the highest increases in the number of sales over the past year…
Download report: 4Q 2006 Long Island/Queens Market Overview [pdf]