Oh absolutely nothing is wrong with a DS rave - it's well-deserved. I guess I was just expecting a thread on Lemmings...and I did love Lemmings so back in the day.
To answer the questions - Lemmings is actually owned by Sony, hence PSP. Having said that, I genuinely couldn't see it working with touchscreen controls given the level of accuracy required. I could be wrong but I think singling out individual lemmings on DS would be an exercise in frustration. No great loss though - I have PSP Lemmings and, while it is a lovely conversion with some great new levels and surprisingly good control, there is such a thing as too much lemmings. It just doesn't have the hold it once did. Having said that, if they do a similar polish-job with Lemmings 2, I'll be first in line.
LostMagic - not me. I've heard a few people say they love it but, on the whole, I'm hearing average reports and, well, the DS has far too many well-above-average games for me to get to it.
PSP - yeah, I play it and love it. But that's because I'm pretty much a handheld-only gamer these days. TR:Legend is excellent on it. Outrun 2006 C2C is fantastic. Monster Hunter rocks. Capcom Classics Remixed is worth the price of a PSP alone in my opinion. SFA3 is great as long as you have the d-pad add-n but serves to highlight just how desperately the PSP needs a redesign. All of those games (well, aside from some on the Capcom collection) I could play on a large console but having them on a handheld is heaven for me and having a handheld that can run current-generation console games without taking much of a hit is something entirely new to handheld gaming.