Online applications and tools

I really love the idea of online applications. The possibility of creating a document and being able to access it from any computer along with others and to, so easily, collaborate with others is really great. The few times I have used it, however, I have had a little trouble getting things to work. I made a presentation in Google Docs and asked it to upload some slides I have already done on Power Point but it didn't quite manage it. Zamzar has also been unavailable at times. Still, they are free and accessible from any computer with Internet access. For a public library I can see a lot of advantages. People can save documents without needing a thumb drive and can create all manner of documents online....if it works.