Unfortunately, we don't have a control for this functionality at the moment. However, it wouldn't be hard to implement. What you should bear in mind is that some of the user data you would like to change also depends on the setting of the provider. So for example, password can be changed only if you allow password retrival on your membership provider and if you don't encrypt the passwords.
To change this information, you need to get a reference of a current user (MembershipUser type) and then you can set any of the properties you see fit. Finally, you need to call Membership.UpdateUser(MembershipUser user) and pass it the object to which you have made changes.
We are using standard ASP.NET membership and there is a plenty of information on that topic. So all the tips and controls that you can find on ASP.NET membership will work with Sitefinity as well.
I hope you'll find this information helpful. Let us know if we can assist you with anything else.
the Telerik team