In researching netbooks recently I saw a review where someone said that they bought the 1000HE from Best Buy, and when they got it home they started noticing things weren't available that they were expecting and eventually found that Best Buy actually sells the 1000 HEB not the 1000 HE. Turns out that the competitively priced computer at Best Buy is a heavily watered down version. Note that the HE-B is the black HE, the HEB is Best Buy's cheapo version.
I did a little searching and here is a list of things I found to be different between the two:
-No Bluetooth on the HEB.
-7 hour battery on HEB as compared to 9.5 on HE.
-HEB has Atom N270 rather than N280 processor. Minimal horsepower difference, 1.6 compared to 1.66 GHz, but it also has higher power consumption and is paired with a slower FSB.
-The HE reportedly has a sound card upgrade, although I could not find the model of either.
-Both have 802.11 b/g/n, but the n is limited to 2.4 mhz on the HEB, compared to 5 on HE.
-HE comes with a laptop protective carrying sleeve
-I could not find any information about eee drive for the HEB, but the HE comes with 10 GB of online storage.
I just found this interesting, and I put the list together from several different sources, so thought it would be worth putting it all together.