I have just discovered OnStage - which is similar to Basecamp as a project management tool. Again - no software to download and you can control who has access to what project. So each client can have their own login to their own projects. You can upload files (including audio files) from whatever computer you are on. My client uploads from his office - I get an email - I retreive the file and do the transcription, then upload the finished report - he gets an email - I send an invoice - too easy! It's made our lives so much easier and my client now doesn't have to drop in discs of audio files for me.