OK! Minolta is out of the market, but it’s still a pretty good flash for Minolta, Konica-Minolta and Sony users. There are some available on the second-hand market and Sony new HVL-F56AM is virtually identical to the original Minolta issue.
Read the review from Imaging Resource. It tells you all about using this flash for wireless control of multi-flash (the speciality of Konica-Minolta/Sony and this specific model).