I did the same as you (except a week before, you got pwned more than me
) and ended up buying a new psp and downgraded it, you may be able to get an exchange, I couldnt because I bought mine from the US and they wont exchange them in the UK.
Anyhow, no not just yet, although this opens the door for a potential downgrader or emulator, but more likely a downgrader, which is preferable so sit tight. Do not upgrade above what you are already. I say this incase Sony brings out any suprise updates in sight of this new exploit.
Soon you should be in the world of 1.50 or now even 1.00 which is already possible for people with 1.50.
But I will only going to 1.00 on my currently 2.71 PSP
Since there is always a slight risk - AS WITH ANY DOWNGRADER, of bricking your system. (If a downgrader comes out that is.)
/ 
