Only three countries have developed manned space vehicles: Russia, US and China. However, since the retirement of NASA's space shuttle program, the US has not had a vehicle (of its own) ready to take astronauts to space. The European Union, Japan, and India have plans to develop manned space programs, and several commercial ventures are working on various ways to get people into space (or at least close to the edge of space). Here are a few ways Americans might get into space in the not-too-distant future.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post