Is it possible to use MacBook Pro with 3 monitors?
False, Dual DVI means that it has more bandwidth, not that you can attach two monitors. Quote from wikipedia article:

To support display devices requiring higher video bandwidth, there is provision for a dual DVI link. A dual link doubles the number of TMDS pairs, effectively doubling video bandwidth at a given pixel clock frequency.
Dual link should not be confused with dual display (also called dual head), which describes those situations where a computer is hooked up to two monitors at once. Neither, either, or both of the dual displays could be dual link. Depending on the video card(s), the displays could be both analog (VGA), an analog and a digital, or both digital.

In order to attach two monitors, you could use a third party device like Matrox GXM (Graphics eXpansion Modules) - you can connect two or three monitors from your Display Port, however, there are some limitations (like the OS does not know natively that there are two or three monitors connected and treats it like one). The price is about $350 for the Tripplehead and around $220 for the Dualhead one.
Here is the GXM homepage.