[W. Knight]

It's unknown if the Netherlands, Spain or Portugal have received the new look. Nickelodeon Austria also got a German language version of the CEE next bumpers with no "Gleich" text. France also received the rebrand too.

Spain and Portugal have rebranded since early August:
youtu.be 

youtu.be 

This video can only be viewed on YouTube.

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Some more news on NickToons US: They're still running with old idents, but the promo for Tyler Perry's Young Dylan closes with an animation from Nick, to a neon green NickToons and yellow TeenNick wordmarks, before going back to the main symbol:
youtu.be 

[Kunst]

There's no "Spain+Portugal" version anymore.

Nickelodeon Iberia is Commercial Light (shared with European French-speaking countries), and most other Nickelodeon's are shared with some other countries.

Except UK, Germany, Italy, Poland (mostly with opt outs of CEE).

And most Dutch-controlled operations have indeed rebranded on the 1st of August.
These are rather bare and generic version of the channels, with similar graphics, similar cookie cutter promos and so on

[Medianext.MX]

Next to rebrand: the Latin American version. The new look has been testing since the beginning of August, and has been airing in a semi-regular basis, but the rebrand didn't officially debut until Tuesday. The DOG has switched to the top-right corner (usually, Nick had its DOG traditionally in the bottom-right for most of its history) and it even moves into the safe pillar boxed area when it airs content in 4:3.

Additionally, its feeds have also switched to the "Commercial Light" model (there are still specific feeds targeting Mexico and Brazil, plus another covering the rest of the continent, with ad variations, plus Portuguese dubbing and graphics in the case of Brazil) after playout was moved from Miami to Telefe in Argentina. 

www.youtube.com 

And, during the tests, something that pres anoraks might like: a breakdown slide.

www.youtube.com 

[W. Knight]

Nick Jr. in the US is in the middle of a refresh, currently this only affects the Nick Jr. on Nick block but will probably come to the standalone channel in the coming weeks. twitter.com 

Nick Jr. has rebranded last week, including the bumpers that are more parents-oriented than the kids.
youtu.be 

[Edogawa Ranpo]

Nick@Nite has rebranded in the US, with roughly about the same branding style as the main Nickelodeon channel, but with more of a retro 80s aesthetic.
www.youtube.com 

[W. Knight]

Tu Hora Nickelodeon, the children's block on Paramount's Chilevisión, has flipped to the new splat with an additional wordmark.
youtu.be