Using the browser via Devhook is slow anyway, because it has to parse the HTML using modules from the memory stick, which is alot slower then loading from the Flash.
With PSPRadio, you cannot use static IP configurations, which may be the problem. If this doesn't solve the equation, try using the Final version instead of a pre-release.
Use Links2 for browsing the web. It's faster, and has less out-of-memory errors. Use the standalone version, not the plugin version though.

If this still doesn't help you, upgrade to 2.00 and then downgrade, so you get a clean installation that isnt forced and isnt messy.

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