You shouldn't really use pt as your measure when doing screen css. they are fine if you're writing a print stylesheet, but px, ems, %, etc... are correct measures for on screen display.
(Sorry, just looked at your css - you have used px, not pt, so ignore that moan
)
It sure does seem small for 11px maybe switch to ems to ensure people can zoom the text if they need to - though it is readable
enough. My main concern is the text you're using an image for under your work thumbnails. This is a little too small to be clear and is slightly distorted (also due to size). It's readable, but I think anyone with any accessibility issues would find your site a nightmare.
Oh, I like the twitter feed in the foot - nice touch.
-Addition-
I shouldn't take so long to reply - someone already spotted the px not pt. lol