Data Extraction without semantic web

Ok, now imagine you could extract any data from the web or any (un-)structured datasets... you got it ? okay now you certainly imagine it's just a dream, or a very expensive technology.

I thought just like you, until i came across this API : http://www.alchemyapi.com/api/ with features like these :

• Entity Extraction
• Text Categorization
• Language Detection
• Concept Tagging
• Keyword Extraction
• Text Extraction
• Content Scraping and Structured Data Extraction
• Microformats Parsing/Extraction
• RSS / ATOM detection

And the basic API is for FREE, and available with a SDK in many languages. I already tried the API in Python and it will clearly be useful to me, now or in the future. Check it out, and tell me what you think.

Vale