(PHP+cURL) Site that aggregates other sites listings

I need to find an apartment for rent in Milano (Italia) and I already found four big sources/sites with such advertisements, that are: - [login to view URL];txtFreeSearch=&Region=9&cat1=3&cat2=304&cat3=341 - [login to view URL];comune=MILANO+%28MI%29&tipologia=appartamento - [login to view URL] - [login to view URL];Offro affitto appartamento"&citta=Milano Unfortunately these sites doesn't have full-text and boolean search capabilities and are it's visually uncomfortable for me to check on four different sites every time. What I want is a single website, preferably coded using PHP and cURL, that grabs and aggregates all the four sources, giving to me the full power of boolean or (even better) extended regular expressions searches on their rentals advertisings. The search engine must be capable of looking through all the fields of the advertisements and must support atleast the boolean operators OR, AND, NOT, jolly "*" at the end, brackets. It must support a number of atleast 30 keywords in a single OR chain (wordone OR wordtwo OR wordthree OR .... OR wordthirty) and it must support titled saved searches (like in eBay), along with parametrized search (city, price, type of rental, according to the four sites structure..). To avoid that everytime I perform a search it downloads from the web sites all the advertisements and their details for each page (too long! they could be more than 100 pages with more than 1000 total advertisements/subpages!), it has to do this only 1 time per 1 or 6 hours, using cached data between one update and the next. Thanks, Luca Villa Note: I pay 3/4 in advance by escrow.