I wouldn't get your hope up, because I haven't heard of much/any development... but, soon everybody will end up upgrading, because the new PSP games will be so good, its like you will be force to upgrade because you want to play them...
Well my guess is that there will be some flaw in 3.00 because of the new features like there was in 2.00 which i got stuck with. Because they went straight for a 2.00 downgrader instead of 1.51 or 1.52 so yah patientce is a virtue.
There really not all that fast, I mean it would be perfect if I could run on zero frameskip but unfortunately I usually need it around four or five to get smooth game play. Though it is nice not having to boot through GTA or anything.