ShoveBox for Mac and iPhone
One thing we don't lack for on the fairer platform is snippet / notes managers. Nonetheless, I always find myself curious about the new applications, perhaps because nothing ever quite gets everything just right. ShoveBox is one of the newer entries in the snippet sweepstakes, and while it has been out on the Mac for a while they've just recently released an companion iPhone app (iTunes link).
ShoveBox's main advantage is its very simple interface. The little ShoveBox icon sits in your menubar waiting for you to drop something on it: URL, text, images, etc. Without any fuss the box opens and accepts your newest shove, ready to be accessed at some later time. My impression is that ShoveBox is best not so much for things you want to keep in the long run (though it will do that), but perhaps more as a scratchpad or an updated and more advanced URLwell.
The iPhone companion app does exactly what you'd expect, giving you access to your notes, etc. on the go. One particularly nifty function is a bookmarklet that allows you to import a website on both the desktop version (from Safari) or the iPhone version (from mobile Safari). So if you're reading something on the go, but want to make sure you save it for later as well, this looks like a great feature.
ShoveBox for Mac is $24.95 and a demo is available; the iPhone version is $3.99 from the iTunes App Store.