I wanted to know how exactly do you put together a HYIP site. Would that focus more around php and Sql? Did I say that right? But I wanted to know what type of script is used to be able to interact with other people's money.

I think making a whole HYIP sites from scratch will be hard , there are lots of scritps you can find which you can use to creae HYIP site , but you need to make sure that those script dont have back door , so that anyone can log in into it

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Bloganywhere.org - Make Sense with blogging !!!
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Well HYIP has lots of scripts and you can easily find out free on different GPT sites and forums. HYIP is biggest scamming group because of 99% site was closed.

What are Hyip sites? Are those the sites that say you can invest $20.00 but make $200.00 over night?

High yield investment programs. Yes Sagemother, you are correct, they are the money for nothing sites basically.

Yes , HYIP is where you can risk your money to get doubled , but in most case yo dont even get the capiital invested

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Bloganywhere.org - Make Sense with blogging !!!
Freelance Web Designer

Well HYIP is most untrustable sites because most of site was closed in first 100 days and scammed many people and make some good money from it.

Many of these sites are probably Ponzi schemes, which are illegal in the USA. I don't know if they are illegal everywhere, but that is another reason they tend not to do well.

Yes Ponzi schemes are banned in many country and those site was closed by goverments in past. Most famous site was 12dp.com

Here's an interesting enough link:

HYIP - Site Statistics of Success

HYIP sites - tranXactGlobal Forums