A lot have people do. It's a great way to get the word out, especially if there is already a large community of people using the group. When using these services, you should be aware of the way they handle links in order to make sure everyone in the group can get to the schedule easily. Make sure you use the built in text editors when emailing/posting to the group.
Sometimes these services are not set up to allow linking text in the post/email. You will need to follow the instructions at whatever site you are on that will tell you how to insert a link in your post or email. Usually, this involves highlighting the pasted link from your foodtidings.com schedule, and clicking the "Link" icon (also called a URL)
If you have questions on how to insert links when posting to these types of services (or even in your email) consult their web sites help pages.