RSSmeme has been slowing down over the last few days and my brief analysis looks like it's due to a lot of people using the search RSS feeds and API. Unfortunatly I've had to disable the search parameter for any format other than the standard HTML that RSSmeme displays.
I'll hopefully be able to restore this soon but in the meantime all of you using complicated Yahoo Pipes filters with RSSmeme might not be seeing results that you'd expect. Sorry.
Update: The personalize feature has also been disabled while I test things out.
Update: RSS and JSON re-enabled. Personalized feature still disabled.