Did you find a solution?
Do your points have ids or anything associated with them that would represent the order in which they should be joined?
At any rate, by far the best tool for this is Safe Software's FME Suite: www.safe.com.
For $750 US you will get the most powerful and easy to use spatial data transformation tool.
I used to work for them and the standard demo was turning a series of points into a line.
If you need more help let me know.
The Oppenheimer Group