"S" in "SN" works. A lightning bolt. However the rest of the "stacker news logo" in that same style doesnt work imo. It has character/uniqueness, sure, but doesnt work well as logo. Here is my proposal:
I like your proposals but I prefer the original because it's made with a font (lightning) so it's easier to use and we can do variations of it with little effort. One can even write an entire post with it.
Not big fan. The "S" seems out of place (way to large compared to the rest of letters). The "N" is also wierd, looks like a glitch rather than intentional.
...allow the N to be a normal N. There's no benefit on drawing attention to an N. The entire point is to accentuate the lightning bolt, the S. Correcting the N focuses attention on the S, rather than drawing attention away from it.
I've also been known to wear the hat of a Professional Brand Publicist for a very long time. IMO, the current logo is PERFECT. other than could just possibly use some more 'yellow highlighting' but that would be all. it has all the characteristics needed for a successful logo!