The Wonderful World of Google Web Fonts
In the early stages of web development, the main reason Flash was the development platform of choice, was because it gave greater design freedom and typographic control. Of course the advent of the iPhone and iPad saw Apple achieve unprecedented growth, and with their opposition to accepting Flash-based content saw Flash flatline as a serious web development tool.
Typography has always been a thorny issue on the web and the confines off websafe fonts (the 18 or so fonts that ship with a pc) has led to a certain sameness across the internet. There have been get arounds, like using cufon fonts, which can turn fonts dynamically into a graphic, but this does impact on site speed and isn't suitable for body text. Clients also have the option of buying a font and uploading to their site, but it's expensive. So those nice people at Google put their heads together and came up with Google web fonts, which puts hundreds of free open source web fonts at your disposal.
The fonts come in all shapes and sizes like classic serif or san serif, modern, whacky, script, you name it, you'll find something close. It certainly does add something to the end product, but in the case of certain organisations, they need to be mindful of the fact that this isn't a print-based font, so in terms of your overall brand, it is worth keeping that separate use the web fonts purely for web headings and body text.