ActiveWords is a great program that many, many people are happily using. It is very effective at speeding up your work. If you have Tablet PC, it is pretty much in the must have category.
One of the good things about the sign up process the ActiveWords is the friction free way anybody can get the product and try it. The two phase approach is something you might consider for your start up.
No credit card/email sign up gets you a five day trial. Sign up with just an email address and you get 60 days to kick the tires.
For potential customers of yours, make sure you make it easy to just download and go or click and go, no friction.