I believe you may have already found the source regarding this order... Anyway, here's a link from CNET reporting the news too (which was quoted from Bloomberg) : http://www.cnetinvestor.com/newsitem-bloomberg.asp?symbol=103896900&Ticker=BA
Re SQ's deployment of the A345s and phasing out of A343s, well, SQ's long-standing "stance" has been that they prefer 4 engines to fly ultra long-haul than 2 engines, for reason than when 1 engine fails, you'll lose only approx 25% power on a 4 engine compared to 50% on a 2 engine (this of course is only assuming you don't adjust the thrust up of all remaining engines etc...) Hence, they opted for the A345s in 1997/8 over the then-proposed 777Xs... As I know, they'll plan to introduce the A345s on non-stop SIN-SFO/LAX routes, and then perhaps in 2006 supplement them with A3xx with a stop either via TPE or NRT. As for the decision to phase out A343s in favour on 772ERs, I'm no too sure about this now - could want to use it for their thinner European long-haul routes - but this could represent a change in mindset about their opinion on 2 engines on long hauls as mentioned earlier. What I do suspect tho, another reason why SQ is not sticking with the 777LRs, could be engine choice. SQ has been a long-time user of only PW engines for all their plane, and until recently when they took the A343s they were "forced" to use CFM and now with their B772s it's RRs. I believe they could be reluctant to introduce yet another type on engine in the GE90 with the 777LRs. At least with phasing out of A343s with 777ERs and acquiring the A345s, they're getting rid of the CFM engines althogether (remember A345s were powered by RRs exclusively too). So, my opinion is that the A345s order could still stay and you'll guys could be seeing them in LAx/SFO come 2002... And perhaps by 2006, you'll maybe only fir Airbuses to LAX/SFO once they started their A3xx... Could be sad for Boeing then, do you think??