Like he said, if you want homebrew don't wait, if you don't mind not having homebrew, wait for it. However it'll be more expensive and you'll only get a few added extras such as lighter weight and brighter screen etc.if you want homebrew then don't get the new one (not yet at least)
Get an older one so you can use homebrew on it, otherwise the machine is so much less than what it could have been capable of.
The new Sony PSP is a nice upgrade over the original model. The lighter system feels much more comfortable in hand and the internal memory upgrade has also improved game performance. The changes aren't drastic enough to get current PSP owners to replace their current systems, but potential buyers leaning towards the PSP will find the new system difficult to resist. Check out our first preview to find out more about the official retail packages shipping next month.