We have been hearing sporadic reports today about issues with BlackBerry World loading on BlackBerry 10. It has been working beautifully on my device but people are reporting it not loading data. Luis was even getting BlackBerry World showing up in different languages. My guess is this has to do with some caching issues on Akamai or whomever is BlackBerry Worlds current CDN but who knows.
Let us know what you see in the comments. Until then Todd let me know about the following workaround:
Go into your music app. Tap the three dot icon in the lower right corner. Click on BlackBerry world. It will launch successfully.