He shows up a bit. Working with the military, IIRC? (it's been a few years since I read it last)
There's another Free Spirit (Not quite as powerful as Seeks) hanging around teh Sanctum as well, helping to protect it.
Daytripper is a spacey, slightly confused looking Free Spirit wearing a powder blue leisure suit. His reasons for hanging out at the Sanctum and helping Dr. Kersh are unknown to all, including Kersh (and possibly Daytripper himself). He will occasionally “sit” on a couch that doesn’t exist and watch an unseen television, laughing at sitcoms only he can see and commenting on them occasionally (“’With god as my witness, I thought turkeys could fly!’ Now that’s funny! They don’t write TV like this anymore!”)
And a pic from that adventure as well:

My old GM, Steven Tinner, wrote this adventure, and Daytripper was originally a Hearth Spirit conjured up by Johnny 99, Bull's old Coyote Shaman partner. As he was the Hearth Spirit for our apartment, he started showing up unsummoned on a semi-regular basis. He was based heavily on Don Knott's character from Three's Company, Mr. Furley. He was an amusing running joke in our game, and eventually when Bug City went down, our apartment got destroyed, and in the process Daytripper was somehow freed. He was fun. And often really, really annoying.