The Sony PSP Go launched yesterday in the United States. Today the PSP Go is starting to ship in the UK. On Amazon UK you can buy the new UMD-less PSP Go for £224.99.

To get some direction you can refer to our Sony PSPgo Review Round-up we posted earlier this week.
The opinions about the PSP go are split. It is a cool new PSP that is smaller and is designed only for digital content delivery. But the price is considered high compared to the PSP-3000.
I would still get a PSP-3000 until Sony gets a grip on the PSP Go pricing. There is an almost £100 price difference right now.