An icosahedron is like a 3-D pentagon, and just as you cannot tile a floor with pentagons, you cannot fill 3-D space with icosahedrons, Royall explained. That is, you can't make a lattice out of pentagons.
An icosahedron has triangular faces. You were thinking of a dodecahedron, perhaps, which has pentagonal faces? The icosahedron's only relation to anything pentagonal (that I'm aware of) is that its dual polyhedron happens to be a dodecahedron.
I use a Zaurus C-1000 for this sort of thing. It is about the size of a large wallet, it has both an SD card slot and a CF card slot (which is part of an internal PCMCIA port), host USB port, IR communication port, 640x480 16-bit color screen, and oversized QWERTY thumboard which is surprisingly easy to type on. The device itself functions like a miniature tablet PC--you can twist the screen around and lay it over the keyboard if you want. I run Debian with XFCE on it from a 4 GB SDHC card and use a Marvell 8385 CF card for wifi. It gets between 3 and 5 hours of continuous web-surfing, about 12 hours of continuous usage without any peripherals, and about a week in hibernation. It has no proprietary drivers, so you can run the latest and greatest Linux kernel on it. The only bottleneck on the device is the peripheral flash controller (if you run from SD); other than that, it's pretty snappy as long as you use light-weight software (only 64 MB RAM).
I got mine off eBay for $300, and it came with a wifi card, a bluetooth card, a CF storage card, the AC adapter, a car power adapter, and a back-up power source. For a small Xscale device that lives in your pocket, it's pretty useful.
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An icosahedron has triangular faces. You were thinking of a dodecahedron, perhaps, which has pentagonal faces? The icosahedron's only relation to anything pentagonal (that I'm aware of) is that its dual polyhedron happens to be a dodecahedron.
I use a Zaurus C-1000 for this sort of thing. It is about the size of a large wallet, it has both an SD card slot and a CF card slot (which is part of an internal PCMCIA port), host USB port, IR communication port, 640x480 16-bit color screen, and oversized QWERTY thumboard which is surprisingly easy to type on. The device itself functions like a miniature tablet PC--you can twist the screen around and lay it over the keyboard if you want. I run Debian with XFCE on it from a 4 GB SDHC card and use a Marvell 8385 CF card for wifi. It gets between 3 and 5 hours of continuous web-surfing, about 12 hours of continuous usage without any peripherals, and about a week in hibernation. It has no proprietary drivers, so you can run the latest and greatest Linux kernel on it. The only bottleneck on the device is the peripheral flash controller (if you run from SD); other than that, it's pretty snappy as long as you use light-weight software (only 64 MB RAM).
I got mine off eBay for $300, and it came with a wifi card, a bluetooth card, a CF storage card, the AC adapter, a car power adapter, and a back-up power source. For a small Xscale device that lives in your pocket, it's pretty useful.
That's funny, because as of today Compiz Fusion hasn't been ported to Windows, and it's better than Vista's UI.