Hi, I just received my Dell Mini 9 today to compare to my MSI Wind, both will be running OS X. While I am awaiting a larger SSD
for the mini, I played around with it and installed and set up OS X on an external drive (which I now can't mount?) and my initial impressions are extremely favorable. The MSI is nice, has the big hard drive, but the design and construction of it are lacking, in my opinion, compared to the Dell. The Dell screen, although smaller, or probably because it is smaller, seems crisper too. The trackpad is also much nicer. The Dell's has a texture to it, the MSI doesn't and for me it is hard to find as it feels identical to the case so I have to look. The webcam is also far superior and the internal mic works (iChat for me is something that has to work on a portable).
The MSI is a sweet little machine and I love that I could put a 500gb drive in it if I wanted, but I will be keeping the Dell and selling the MSI as the Dell seems to be just a little bit better all around for my needs, and a little more compatible with OS X.