Web designers and front-end developers have always clashed when it comes to fonts. The list of web-safe fonts is very short, and some aren’t real usable in many situations — Comic Sans MS, I’m looking at you!
There have been some attempts of introducing fonts via Flash or images, but neither are completely accessible or the end-all-be-all of search engine optimization. Today, Google offered up their solution. Time will tell how effective, usable and used it will become. The one stumbling block I see — at least initially is the fact that it utilizes all open-source fonts. But then again, more universally web-usable fonts for a designer to utilize should help regardless.