核心问题
I think it would be a good idea to have comments from secretaries and typists who are already using it.
already 应与现在完成时连用。上句中的 already 怎么与现在进行时连用呢？
词典解答
already 常常与现在完成时或过去完成时连用：
-
Have you typed my letter already? ——Yes, I've already typed it. 我的信你已经打好了吗？——是的，我已经打好了。
-
When I rang, Jim had already left. 我打电话的时候,吉姆已经走了。
但是, already 也可与其他时态连用:
-
We must hurry. It's already 5 o'clock. 我们必须赶快,已经5点了。
-
This time tomorrow I'll already be in Tokyo. 明天这个时候我已经在东京了。
-
Britain is already exploiting a little coal. 英国已经在开采少量的煤。
-
I was happy for her; she looked better already. 我为她高兴；她看起来已经好些了。
-
The train was already moving. 火车已经在移动了。
由此看来,问句中的 are already using 的用法是正确的,而且比用 have already used 更好,因为它突出了“正在使用”这层含义。