The Olympic Bell was not made [I think "forged" is the wrong word here] in the Whitechapel Foundry, but designed by them and (because of its size) subcontracted to a Dutch firm, much to the annoyance of rival founders Taylors of Loughborough, who had submitted a tender on the basis that they would cast it in Britain.
http://www.dailymail.co.uk/news/article-2132309/Why-London-2012-Olympics-bell-cast-Holland-.html

“F Buttons’s” seems wrong at both ends, though the decision not to print the full first word is in line with the official listing.

The “Hobbit set” version of the British countryside has emerged as one element of a strong (if occasionally frivolous) internet meme based on comparisons of stills from the ceremony and from Peter Jackson’s Lord of the Rings films.
http://geektyrant.com/news/2012/7/30/olympics-opening-ceremony-shout-out-to-lord-of-the-rings.html
See also Tolkien’s own illustration “The Hill: Hobbiton-Across-the-Water” from “The Hobbit”.
Treating Tolkien as the elephant in the room raises all sorts of possibilities, providing, for example, an explanation for the numerology of the event, in the famous verse from LOTR which lists the various odd-numbered sets of rings of power. On the other hand, there is another (perhaps additional rather than alternative) explanation for the number choices and almost everything else in the production- the great game of “tease the Chinese”. Where the Beijing 2008 opening ceremony had a traditionally lucky eight bearers of the Olympic flag, London added a very special ninth in the form of Mohammed Ali, one of many 2012 participants who challenged the 2008 aura of airbrushed perfection.

The Giant Baby- good call on the ultrasound, neatly explaining the ripples seen on the baby’s body, and the lack of colour. However, the Scottish team’s triumph from the late 1950s onward was specifically the development of ultrasound imaging for obstetrics- the basic principle had been pioneered a decade earlier in the USA.
http://www.ob-ultrasound.net/history1.html

Your explanation of the origin of the title “Chariots of Fire” is a little unclear. The “Jerusalem” verses form part of Blake’s preface to his poem “Milton” (a preface which is, amusingly in this context, a call for revolution against the cultural traditions which originated in ancient Greece).

The pogoing punks first appeared to accompany “Pretty Vacant” back in the Seventies, then bounced back for “Firestarter”. And yes, “Born Slippy” was given its famous context in “Trainspotting”.

Nice to see “Wall-E” in the kissing montage. I suspect that if asked, Danny Boyle would not begrudge the loss of one or two of his “Slumdog Millionaire” Oscars which, under a less anti-animation Academy regime, might have gone instead to the Pixar classic.
Typo “Dizzie” for “Dizzee” at the end of the kiss section.

Do enough of us actually know with confidence who Tim Berners-Lee is? Many a geek in recent weeks has had to point out that he did not “invent the internet”. Rather, as his tweet indicated, he took an internet which had existed for two decades as a walled garden for academics and techies, and transformed it into the first digital information sharing system “for everyone”.

The 7/7 bombings connection for “Abide With Me” is intriguing precisely because it is NOT a “heavy reference”. There were many photos in the memory wall section, all uncaptioned, and if Hazel Irvine hadn’t highlighted 7/7 in the BBC commentary, we would all have been left to interpret the tribute in our own ways.

“Several” cyclists dressed as doves- did you mean something like “several dozen” or were you distracted by NBC’s commentators?

Ending fireworks- perhaps worth mentioning that the music was Pink Floyd’s “Eclipse”, ending with the words “And the sun is eclipsed by the moon”, the significance of which seems to have become apparent at the beginning of the Paralympic opening ceremony.

It has been reported that there was a longer Dr Who video montage right up to the final rehearsals, but it was cut for timing reasons, leaving a double swish as the only reference to the world’s longest-running SciFi series.

At about 5 seconds here: http://www.youtube.com/watch?v=78bGdSd9S9E