I believe you have already heard about a project called Stable-Profit. It has been operating since September 12, 2011, which is a long period for a program of its kind (it is a short-term paying on expiry HYIP), which demonstrates that it has achieved good results. The shortest investment plan lasts for 1 day, so it has been already completed 70 (!) times.
You can join the project with $10 minimum in the following plans: 105%-125% after 1 day, 116%-200% after 3 days, and 136%-500% after 6 days. The following two plans should be avoided because they require too large minimum deposit amounts. If you wish to receive 1000% after 10 days, you will have to invest $5,000 minimum and 3000% after 25 days will be yours if you deposit $8,000 minimum.
Stable-Profit accepts payments to LibertyReserve and PerfectMoney. Note, that payouts are processed manually and have to be requested. You must allow up to 24 hours for your payment to be received. The offered referral commission for everyone who is willing to promote Stable-Profit is up to 12%. The used script is from GoldCoders, the website is DDoS protected by AntiDDoS and is hosted on its dedicated server (as far as we know there haven't been any problems with accessibility so far, so this hosting provider was a good choice). Your data is also protected by a secure SSL encryption.
In case you have questions, you may ask them by phone +18052971727 (which does not necessarily work and should be checked). And of course, you can send your queries by filling out a feedback form on the “customer support” page. Stable-Profit has already brought much more profits to investors that most short-term projects do and it's admin actively sends out newsletters and supports investors. However, you should remember that it remains a short-term HYIP which do not operate for too long.