I am happy to announce that after a long weekend of coding, testing, and poring over documentation, I have gotten the first bits of TI-83+SE, TI-84+, and TI-84+SE support in jsTIfied functioning. Thanks to the generous Buckeye and the WabbitEmu project, jsTIfied will display one of four spiffy, high-resolution skins matching the calculator version of the ROM you load. It emulates the extra Flash and RAM (the full 128KB!) of the newer graphing calculators, properly implements features like the realtime clock ports, and much more. However, the new support is still very beta, so a few features are known to be missing. Loading apps and programs to the new models does not yet work, Link Assist is a work-in-progress, and the crystal-based Timer0/Timer1/Timer2 are incompletely implemented. However, I'm making swift strides in adding these new features, so by the time you test jsTIfied some of those issues may be fixed.
I urge you to load up jsTIfied and give it a try. Please be sure to tell me about any bugs you encounter (other than the ones I mentioned), and mention any suggestions to make the emulator more useable. Please also tell your teachers and friends about it, so that they will avoid the pitfall many of my teachers fell into in struggling with the ancient and now-supplanted VTI emulator.