Because of an FCC filing that was recently leaked out that pointed to Sony's own "elite" PlayStation 3, the company has already come out and denied that such an action means a new PS3 is coming out ... at this time. In only the vague way Sony can, all they could say was basically no "new product announcement at this time." Oh come on, just tell us. We already know! From Next-Gen:

"As mentioned when we made the product announcement for PS3, the system will have different configurations (thus, 60GB HDD with memory card slots and Wi-Fi and 20GB HDD without memory card slots or Wi-Fi both exist)," wrote a Sony PR rep in an e-mail to Next-Gen. "Application to the FCC has been made with various possibilities in mind, however, it does not lead to a new product announcement at this time."

On March 2, Sony filed an FCC "Class II Permissive Change" request regarding the PS3's Bluetooth module. The documentation mentions the addition of an 80GB PS3 model, complete with model number.

Considering it will come out, I'd be willing to bet that when it does it will cost the same as the 60GB version now and the other two console configurations will drop in price. I'd even go so far as to say the 20GB version will be phased out within a year or two.