Not sure about this particular Uslan, but other Uslans are said to pronounce their names that way (the final syllable, I assume, is meant to be pronounced like the final syllable in "Macmillan"):

Ethan Uslan (pronounced "Yoo-slin") is one of the hottest names on the ragtime/ traditional jazz scene today. The first place winner of the 2007 World ...
www.uslanmusic.com/bio.html

Eytan Uslan—pronounced "Ay-tahn Yoo-slin"—is a mild-mannered librarian at JCSU who enjoys showing students the finer points of academic research. ...
www.jcsu.edu/lyceum/ragtime.htm -

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Note added at 8 mins (2009-01-27 13:49:43 GMT)
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And here's a confirmation on our Michael:

... Uslin, Michael (YOOS-lin) audio file. Ustinov, Peter (YOOS-ti-nôf) audio file ...
www.sos.mo.gov/wolfner/SayHow/?id=u

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Note added at 9 mins (2009-01-27 13:51:03 GMT)
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You can actually hear it pronounced on that last link. It's an extremely useful site that tells you how to pronounce the names of (mainly US) public figures.