I think they work fine! The only problem is that they can loose caracter, when applied black and white (monochrome).

Transparency is possible today, but keep in mind that not long ago this was a printing nightmare. Besides the [gone] printing issues, this also limits the available supports (e.g. for placing the logo on a building's façade).

Transparency can be used in building signage. During my time at an exhibit house we made plenty of 3-D facade logos which included transparency. This was in 2003 just as the Rigid Print flatbeds were being introduced to the market.

One would imagine as these machine have found their ways into production houses transparent elements are even easier to create today. Secondly with UV clear film printed on a wide format followed by 2nd surface sandwich mounting between plex and sealed against elements is another way for large scale facade logos.

Transparency does work in many ways. Yes the solid fill is necessary within some specific printing materials however these so called inexperienced (junior) designers have pushed the creativity many times with the use of Transparency design that it stands out and looks far more refreshing to other logos. These are contemporary designs that wins many of our clients

The transparency trend in 2008 does not only convey "growth" and "development" but ACTION and MOTION. Not only is the logo progressive and signifies advancement, the transparency and color levels give off a distinct sense of movement that displays to the customer a company that is both proactive and dynamic.