UPDATED 4/26/2006:

Controversy over the "Kidd of Speed" website [NeilGaiman.com]
Ukraine Remembers Chernobyl Nuclear Accident [AP, CBS2 Chicago]
An extensive gallery of Chernobyl Images from the INSP (http://insp.pnl.gov/-library-uk_ch_1-1.htm)
BBC: Chernobyl 20 Years On

The German nuclear-safety agency GRS [Gesellschaft für Anlagen und Reaktorsicherheit, mbH] has a well-illustrated, informative 179-page free online technical report called "The Accident and the Safety of RBMK Reactors" [large PDF file, 5Mb].

If you enjoy government reports and "blue books," visit the World Nuclear Association's Chernobyl page, which includes links to UNSCEAR [United Nations Scientific Committee on the Effects of Atomic Radiation, which published several comprehensive reports on the Chernobyl disaster - many which are available here as free PDF downloads.

Watch This: Chernobyl.co.uk, a UK site which features a link to the BBC's recent 30-minute program [streaming RealPlayer video] on Chernobyl, featuring a look at the history of nuclear power in the former Soviet Union as well as a look inside Ukraine's Exclusion Zone towns. Highly recommended: this program illustrates that the deteriorating reactor site is still an issue of pressing concern through Europe, while it has been all but overshadowed here in the U.S.

Watch This: though the bulk of Chernobyl news coverage occurred before the age of streaming video, the post-date digitized BBC retrospective of the Chernobyl disaster [RealPlayer required] is a wistfully immediate - if lo-res - look back at those fateful days in April 1986.

Ukrainian biker gal (and young scientist) Elena is the Kidd [sic] of Speed: her wildly popular site, Ghost Town, features dozens of startling photos and rueful, blustering commentary from her motorcycle tour through the post-apocalyptic Exclusion Zone in Pripyat': part National Geographic expedition, part Jackass-meets-Evel Knievel. Strange thing is, I'd probably do it too, given the opportunity and a lead X-ray apron - but I'd prefer an enclosed vehicle, like a Bradley.

Got Euskadi? The Basque Website of Pripyat.

Have Paris, Rome, and the Caribbean lost their appeal? Been there, done that? How about a guided group tour through Chernobyl? I don't know if it's a legitimate enterprise, but you can apparently book a tour through the Exclusion Zone via Ukrainian Web Chyornobyl' Tour. You get complimentary disposable outerwear and shoes, and a souvenir computerized dosimeter printout that certifies how much radiation you absorbed during your visit.

The Jet Propulsion Laboratory's Pioneer Robot pages, with photos and diagrams of the Red Zone Robotics radiation-hardened explorer robot that will be used to excavate and explore the hot ruin inside the Sarcophagus.

A recent Kazakhstan Kazinform press release from March, 2004, warning that trouble at the Chernobyl Sarcophagus could be imminent.

From a nation that is also highly dependent on nuclear energy, but has thankfully suffered neither a Chernobyl nor a Three Mile Island type incident - the Canadian Nuclear Association's report on Chernobyl.

USGS satellite photos showing changes in the Chernobyl region from 1986 to 1992.

An August, 1986 EPA Bulletin on short-term American response to the Chernobyl disaster.

Gla55pak.com has compiled some unusual Chernobyl images here, and proclaims "I have a sick curiosity - more of an impulse - to be there that night and watch the thing light up. I would gladly take a good dose just to have seen it. It is, after all, like an immense train wreck that I just can't help but see." Also: link to Disenchanted.com's take on the Chernobyl and TMI incidents, called "Fear's just bad for business".

A high-resolution satellite image of the Chernobyl region from the Jet Propulsion Laboratory, suitable for desktop backgrounds.

Some of the best photos of the site I have seen are on the INSP's [International Nuclear Safety Program] Digital Library Website, where you can view over 800 color and black-and-white images, including the one at the top of this post.