http://jarrin.net/JPG_to_AVI.html
No idea if it works or how it works, but it was the first result on google and looks promising.
Do note the author's comment in the comments section:
Quote: "That's accurate: it does no compression; the resultant video is totally raw. RAW! What I do is pull the avi into Adobe Premiere, add headers and footers and such, then export it as something more reasonable. This tool is only meant to be a rudimentary way to create a video stream from a series of still images."
And someone else's comment:
Quote: "Works great for me too. Took awhile to figure out that I had to have "0"s stuffed padding the seq number to get the proper order. But it works really, really well. Thank you for an awesome tool!"