No. No. A hundred thousand times no.
Mur, sorry to say, I think you screwed up.
First, let me say that I've been looking forward to EP 300 since May. I figured that Steve's Grandmaster tradition would continue, so I was incredibly excited. When I heard Mur say that this would be a modern story, instead of an old one, I was a little disappointed. I had been hoping for Herbert or Clark or Silverberg. But when Mur said it would be a Tim Pratt story, I was still pretty pumped - Tim is a great and well-known author. Then I realized it was a YA story, and my spirits sank even further. There are a few really good YA stories, so I hadn't lost all hope yet. Now let me list the ways in which the story itself disappointed me.
1 - I hated the main character. Given a device which allows literally infinite opportunities for exploration, she is inert. The excuses she gives - no money, age, sentiment - are easily circumvented. She appears to have no desire to escape her life, which she hates. I had nothing but contempt for her, honestly.
2 - logic gaps the size of the sun.
3 - I felt like this had potential. If the MC and Jenny had left together - not an unreasonable proposition, since they are both miserable - they could have had a novel-sized adventure. Here's a plot off the top of my head.
They go to the Nex, where Jenny receives something cool to counterpart the jumpgate. The two of them navigate the Great Material Continuum, trading goods between universes and making a fat profit. One of the other ringbearers, who secretly leads a neo-Mexican drug smuggling operation, blows up something and blames them. Penniless, they escape into the multiverse, along with the cyborg, who was also framed, trading, exploring, making new friends, and eventually getting the phlebotnium, the McGuffin, and the proof they need that they are innocent. They then part ways, Jenny becoming
an apprentice as in the story, and the MC carrying on with the business and/or seeing her parents.
Not the most original, I'll grant, but it wouldn't be as jarring as the story was.
Also, one thing that nobody's pointed out - and the worst time travel mistake that people make - is the small problem that the MC is aging two weeks every other night or so. That's 7 years in one year. Bit noticeable, that...
All in all, a "meh" story, but absolutely NOT centennial-worthy. As a point of interest, Mur, why this one for the centennial? We had a time travel/teleportation story last time too...