Hi Deborah,
Technically it wouldn't be too hard, though I don't think we'd do it in the e-mail updates. They're already pretty overloaded. On the weeks that we do the WikiTree News and Tips it goes out to 70,000+ people and takes almost all day to process.
We could just do it on a special page. There'd be an anniversaries link from your Watchlist, pull-down menu, or wherever. That page could have all the birthdays, death date anniversaries, and wedding anniversaries for the current month.
If this is something that members would really use, we'll put it on the to-do list.
For everyone who sees this: How important would this be to you? If you'd really like to have it, post here and vote up the question.
Thanks,
Chris