I see it all over the sky in the first photo, and perhaps in the paint on the car in the second. It would probably be much more noticeable if viewed full size. My E-P1 is noisy that way too.
Here's the thing, though - I don't think it's just sensor noise. I have the same lens as you, and it's noisy. When I took a couple of photos with a borrowed Panasonic 20mm, and when I use my adapted Pentax 50mm, I get much less noise at the same ISO. The difference is jaw-dropping.
I don't know what the mechanics of noise production is in this case. After getting my E-P1, I was initially disappointed that my images were noisier than what I was getting with my five year old Kodak EasyShare. Now I'm just disappointed that the kit lens has disadvantages that nearly balance out its advantages.