Ian
There is a great section on time lapse in the tutorial section on Vimeo.
On Vimeo they tend to suggest Quicktime Pro but TBH I believe many video programs can cope with time lapse - what are you currently using?
For instance on QT Pro you import pictures using Open>Image Sequence, whereas on Premiere I believe you use the Import function, point to the first image in the sequence and then click the Check Box 'Image Sequence'. In both instances (and probably on other programs) it's important that you have all photos in one folder and they are sequentially numbered.
I've been having a bit of a play with time lapse recently with varying results. A couple of things I picked up were;
1) Buy an intervalometer (is that what they are called?) - I picked one up cheap from eBay.
2) If shooting people of other moving objects use a long shutter speed - for instance 1/2 a second, with a shot every second. To do this I needed to buy some ND filters. This stops the 'blippy' effect and gives a blurred look to the moving objects in the video.