Lytro Light Field Camera - specifications, good and bad

Lytro camera had been a hot topic in the news, and now available in the market (online order). There are three options: Red Hot (16GB) for $499, Graphite (8GB) $399, Electric Blue (8GB) $399.

Specifications:

Lens-8x optical zoom; Constant f/2 lens.
Controls Power button: Shutter button; Zoom slider; Touchscreen
Display-1.52 in | 38.55mm back-lit LCD display with glass touchscreen.
Light Field Resolution:-11 Megarays: the number of light rays captured by the light field sensor.
Dimensions-1.61 in x 1.61 in x 4.41 in | 41 mm x 41 mm x 112 mm
Image Resolution: 1080x1080-pixel; JPEG

Good:
Easy to use/operate
No need to worry about focus, which can be set to any point in the picture with the bundled software.
Easy to use, only tap to take, slide on the top to zoom.
Turns on instantly.
Fast shutter response.
Little delay between taking photos.
Small and light.
Free Web storage and viewing service.

Bad:
Limited resolution.
Not really "portable", hard to fit into pocket.
Grainy and noisy in low light environment.
A little too expansive for a fancy toy/gadget.
Lytro photos can be posted online ONLY(!!!) via the company's site; currently the camera works only with Macs with OS X (too bad to Windows users!!!)
Lytro photos cannot be edited in any way except focus
Large file size; 5 tt 10 times larger when compared to JPG format of typical qualities, with about times more numbers of pixels (12MP)!

References:

Lytro review-You've never seen a camera like this before
Lytro Light Field Camera

SPI - Serial Peripheral Interface

SPI (Serial Peripheral Interface)is a synchronous serial data link standard named by Motorola that operates in full duplex mode. It is requires more wires than IIC (aka I2C), but has higher communication speed.

A SPI bus has four logical signals:

• SCLK: Serial Clock (output from master; aka SCK; CLK);
• MOSI; SIMO: Master Output, Slave Input (output from master; aka SDI; DI, DIN, SI);
• MISO; SOMI: Master Input, Slave Output (output from slave; aka SDO; DO, DOUT, SO: Serial Data Out; Data Out, Serial Out);
• SS: Slave Select (active low, output from master; aka nCS, CS, CSB, CSN, nSS, STE: Chip Select, Slave Transmit Enable).

According to wikipedia, there are 4 modes in SPI communications:

In addition to setting the clock frequency, the master must also configure the clock polarity and phase with respect to the data. Freescale's SPI Block Guide names these two options as CPOL (aka CKP - Clock Polarity) and CPHA (aka CKE - Data Clock Edge) respectively, and most vendors have adopted that convention.

References:
SPI Introduction
SPIGen
SPI Block Guide V03.06

Email anonymity breached?

According to TECHWORLD, Canadian researchers came up with a method to identify the writers of e-mails. As high-tech as it sounds, the ideas behind it is nothing but "sniffing out patterns in their writing style from use of all lowercase letters to common typos". If it goes well, it means that the sender of an e-mail can be singled out even if sent anonymously, especially those of malicious spam e-mails.

Concordia researchers tested their system by putting it to use on over 200,000 emails from 158 employees of Enron, and were able to identify authors 80% to 90% of the time.

80% to 90%... um, sounds like a promising number. But wait, what would happen to the 10% to 20% that might be wrongfully judged as  criminals?