The AJ's sale is closed, thanks to HowieMandel over on Queens Central for the tip. Looks like Sal is taking a permanent vacation and we can let the speculation begin.
About the buyer. Pay attention, this gets confusing and boring:
The company is listed as Broadway Enterprises at 36-09 Main St. Flushing, Suite 3A. http://a836-acris.nyc.gov/Scripts/DocSearch.dll/ViewImage?Doc_ID=2008062100072001
According to this document, 36-09 Main St. Suite 3A is occupied by a developer named Henry Huang. www.nyc.gov/html/dob/downloads/excel/sg120205.xls
Henry Huang is also listed in this document at 36-09, #3A, but under a different business name: www.nyc.gov/html/dob/downloads/excel/job020908.xls
And finally the Juniper Civic News reports that notorious developer Tommy Huang has a son named Henry, who is also the President of the company. The office address? Yes you guessed it, 36-09 Main St. (however, no suite number and it's a large office building). http://www.junipercivic.com/PressReleaseArticle.asp?nid=24
So the AJ's building might have been sold to Tommy Huang's company, which has drawn the ire of Queens local newsers for never seeing a Fedder's building he didn't like. My guess is there's more than one Henry Huang in Flushing so it's still speculation until we can get confirmation.
However, if true, Sal sold out to the highest bidder, one who has an awful reputation in the borough, and this "vacation" and other stern denials was a bunch of hooey. But, hey, he sang on Thursdays.