disassembly of the DSi actually looks a bit easier than the ds lite (no more rolled up flat cable to worry about). I'll probably put together a guide shortly once one of the HK companies provide replacement cases (and yes, I can't believe that they haven't churned them out yet considering that the DSi has been available for 6 months in japan already).
the blue coloured DSi that was released here in the states 2 weeks ago is actually a bright orange/yellow colour and then painted. (very odd) it reminds me of the way auto bumpers were manufacturered in the late 80's / early 90's
@Zyvyn there aren't any except those 2 currently but more are planned and when they're added you can see them here: https://gbatemp.net/help/categorized-trophies/
I got there by clicking the number of trophies I have, and then clicking the button labelled "View all available trophies"