(I'll be honest - I'm fairly sure that you never wondered what happened to these folks - in fact, I'm pretty sure I was the only middle-schooler out there devoted to this show - but I'm bored, so humor me.)
I posted a picture of the cast member when they were on "Wings" first and a recent picture second where available.
Tim Daly played Joe Hackett
Tim Daly is currently acting on the Grey's Anatomy spin-off Private Practice as Dr. Addison Montgomery's love interest Dr. Pete Wilder. He had a number of starring roles on cancelled but usually lauded shows like The Fugitive, The Nine, and Eyes.
He has been married to actress Amy van Nostrand since 1982 and has two children with her, Sam and Emelyn.
Click below for updates on Helen, Brian, Antonio, Lowell, Faye, Roy, Casey and Alex. Note: image-intensive.
Crystal Bernard played Helen Chappel Hackett
Crystal Bernard is an aspiring country artist with two records under her belt. Next up for her is a starring role in the TV movie, Grave Misconduct.
I couldn't find anything about her personal life.
Steven Weber played Brian Hackett
Steven Weber has had a number of starring roles since leaving "Wings," including his own sitcom called Cursed and a starring role on the cancelled Studio 60 on the Sunset Strip. He recently had a three-episode stint on Law and Order: SVU. He has a thriller called Farmhouse in production currently.
He has been married to his second wife Juliette Hohnen since 1995 and has two children with her, Alfie and Jack.
Tony Shalhoub played Antonio Scarpacci
Tony Shalhoub has played detective Adrian Monk on the USA show Monk since 2002. **I was mistaken in indicating that Monk had recently been cancelled - the show is currently in negotiations to continue per Variety. Thanks, agateway.**He recently voiced Luigi in the Disney/Pixar film Cars and is playing Parking Violations Bureau Agent in an upcoming film called The Adventures of Beatle Boyin.
He has been married to actress Brooke Adams since 1992 and has two daughters with her, Josie and Sophie.
Thomas Haden Church played Lowell Mather
Thomas Haden Church recently played the Sandman in Spiderman 3 and won an Emmy for his role in the TV western Broken Trail.
He recently married his girlfriend of a number of years, ex-porn actress Mia Zottoli, with whom he had a daughter Cody in 2004.
Rebecca Schull played Fay Schlob Dumbly DeVay Cochran
Rebecca Schull has had notable roles in Analyze This, United 93 and Little Children since leaving Wings.
She has three children and one grandchild with her husband Gene Schull.
Amy Yasbeck played Cassandra "Casey" Chappel Davenport
Amy Yasbeck has recently has roles on the Disney Channel's "That's So Raven!" and voiced Danielle in an episode of Shorty McShort Shorts. (What the hell is that?)
She was left a widow after the death of her husband John Ritter, with whom she has one daughter Stella and three stepchildren.
David Schramm played Roy Biggins
Mr. Schramm's last role was on Wings, which ended in 1997. According to some Wings fansites, Mr. Schramm has recently been in ill-health due to his obesity. There are rumors that he may be attached to star in some local community theater productions.
Farrah Forke played Alex Lambert
Farrah Forke voiced Big Barda in the animated version of the Justice League in 2005.
She suffered from problems after her silicone breast implants leaked and sued the manufacturer. She gave birth to twins Chuck and Wit Forke in 2005 and lives in Texas.
Source 1, Source 2