TechSpot posted Asus Eee PC 1101HA Seashell Netbook Review. Here's a taster:

Like the majority of netbooks we've seen, the Eee PC 1011HA comes preinstalled with Windows XP, which is a good fit for the hardware. The use of an Atom Z520 processor, rather than the more traditional N270 or N280 variety, means you'll be making some compromises in terms of performance to favor longer battery duration.

For our test the system was left idle at the Windows desktop with half screen brightness and all power saving features disabled. We were pleased to see the 1011HA achieve a run time of 8 hours and 45 minutes, which is just 5 minutes shy of the Acer Timeline 4810T notebook we reviewed a few months back. Compared to other netbooks, the Eee beat out our previous best of 7 hours and 58 minutes with the Aspire One 751h.

Performance-wise the Eee PC 1101HA is pretty much on par with the Aspire One 751h given that the two share the same processor and memory configuration. The obvious game-changer here is the Seashell's ability to be overclocked. When comparing benchmark numbers with the Atom Z520 pushed to 1.74GHz, the Eee PC 1101HA was clearly superior -- it even managed to outclass the Aspire One 8.9" equipped with a 1.60GHz Atom N270 in every test except Super Pi's 4M test.

When using the Seashell under normal conditions heat and noise were not an issue. The fan noise is a bit louder with the processor overclocked to 1.74GHz but not any more so than other netbooks.