There aren't aren't a whole lot of accents, so the only one would maybe be fí. In all caps raising the ¿ can be nice but isn't obligatory. A quick look at advertisements in and around Madrid will show it's not the norm.

The m-dash comes along a bit more in Spanish and has spacing rules that can differ from English styles. It spacing usage in Spanish is equivalent to a parenthesis. That is:

Foo —bar— foo. But:
Foo —bar—, foo.

If it's done in a handwriting font, (this may or may not apply in South America), the capital i will frequently maintain its dot. And universally in the Spanish-speaking world, the tilde can transform into a macron both in handwriting and more geometric fonts.

Brasíl: the accent hits the following serif in some typefaces.

Nick: Brasil doesn't have an accent in Spanish, but it would hold true for í+stem (bhlk) although off the top of my head I can't think of many examples. íbamos, um, and that's it.

On second thought, a quick search through El buscón (Ricardo López Aranda) lists the following í+stem combinations:

ÍL:
sacrílego (+derivatives)
arrodíllase
perdíla (modern orthography: perdila)
vendíla (m.o.: vendíla)
díle (m.o.: dile)

ÍB:
íbanse (+derivatives)

ÍH: none
ÍK: none

Must have been thinking of Brasília...

Hey, thanks a lot! This is good stuff. :)

best regards,
daniel