You know what we say? Lair-Shmair. Who cares if there's a killer-app on PS3 if they're going to keep updating the firmware all the time? It's like getting a new console every couple of weeks! (Sure, 360 owners can say the same, but that just because they have to keep mailing them off for repair.) Take, for instance, firmware 1.93 coming in the "next few days" that ... well, it fixes a network disconnect problem created by 1.92. Hmm. ... Let's move on.
On PSP, you've got the upcoming 3.71, which adds "many features that readers [of the Sony blog] have requested." No, they're not talking about any at the moment except for themes, which was actually in 3.70. Either way it's a "must-download," if only to protect ourselves from the ever-approaching homebrew menace.