No, currently aliases can be delivered to only one user (we're working on this!). In the meantime, if you'd like to create an email list that's delivered to many users, you can create a Yahoo! Group. To get started:
Gather all the email addresses for your group members.
Arrange them in a text list, one per line.
Once you've set up your group, go to the Members section of your group and click on the Invite Members link.
Follow the instructions to invite people to your group. For more information on how to invite members, please refer to the Members Help.
For more help with your Yahoo! Group, visit the Groups Help.