Uh. I don't know about "aweseomesauce" but the first time I ever heard "weaksauce" was when one of my teachers said it my Sophomore year. Weaksauce has always been a real world term for me. Don't know it's origins but seeing as how I first heard the term in real life 5 years ago, I never ever assumed it was an internet term. And I don't think it is.
Ugh, there's Awesomesauce all over the toilet seat.
Homestar Runner dot com. That's all it is. Let it go. Move onto Trogdor, Arrow'd!, I don't like food anymore, I'm a song from the sixties, prepare to get pistol whipped snowman or possibly even conbulations elizagerth.