There's this site:
http://www.recipezaar.com/
It looks like (and I haven't tried it, so I'm not sure) you can share a recipe, and when they put it online, they add the nutritional info. You have to register to do this, and if you don't want to shell out the extra bucks for a premium subscription there are a lot of annoying pop-up ads, but it could still be useful.
I also found some software to download that will analyze your recipe, but it's just something that some guy did - so I don't know if it works or if it's safe (ie, won't demolish your hard drive, crash your os, or install viruses, spyware, malware, etc). There is a 20 day (I think - or maybe 30 day) free trial, then you have to pay for it. Since I know nothing about the security of the site or program, I'm not listing the link here - if someone *desperately* wants to give it a try and just cannot find it via Google or whatever, pm me and I'll try to find it again for you - but you try it at your own risk. Personally, I wouldn't touch it, for security reasons.
I might try the Recipezaar thing though - has anyone here tried sharing recipes there? Does it work the way I think it does, with the nutritional info? How long does it take them to put it online, or is it immediate?
I have to get back to work now - if I can, I'll poke around some more next time I pause for tea.