> Paul,
> trying to remember if there's any Spider-Boys other than the Amalgam superhero who's half-Spiderman/half-Superboy...

Nope, I'm the one and only. Make Mine Amalgam and all that good stuff.

Seriously thought, you read the Amalgam books. cool. I loved those books (as my nom-de-plum tells you). I have a poster of them on my wall. Spider-boy was the best, though JLX was a close second.
for those of you not in the know Amalgam comics is what happened when DC Comics and Marvel Comics merged their respective super-hero universes. some of the results are as follows.

Superman+Captain Americas= Super Soilder
Batman+Wolverine= Dark Claw
Superboy+Spider-Man= Spider-Boy;)
JLA+X-Men=JLX
Wonder Woman+Storm=Amazon

I made up some of my own
Emerald Surfer= Green Lanter+ Silver Surfer
Dark Knight= Batman+ Black Knight
Running Gag= Impulse+ Slapstick

Thats all for now folks
Spider-youlikemeyoureallylikeme-Boy