Microsoft Store offers the 2.3-lb. Acer Aspire E11 Intel Celeron 2.16GHz 11.6" Signature Edition Laptop, model no. ES1-111M-C0FQ, for $149 with free shipping. That's tied with last week's mention and the lowest total price we've seen. (It's a current price low by $51.) It features an Intel Celeron N2840 2.16GHz dual-core processor, 11.6" 1366x768 LED-backlit LCD, 2GB RAM, 32GB flash memory, webcam, 802.11n wireless, USB 3.0, 3-cell battery, and Windows 8.1 64-bit.
If you haven't yet, text the word "MSSTORE" to 29502 to receive a 5% off coupon code that knocks the price to $141.55. (It can only be used once per account.)