I'd like to know if Panasonic and/or Olympus have plans for higher pixel count on their sensors?

I make my full time living as a fine art photographer and though I loved the GF1 and lenses I had- 12MP was too small for big enlargements which is my main output. I have seen posts in various places that these manufacturers will stay at 12MP but nothing to substantiate it. I'd love to see at least 18MP. I get tired of having to schlepp a full sized DSLR system and would welcome the ability to use a micro 4/3 for some of my work. Great bodies and lenses are already in place!