@Devin,
You will be able to use your Trezor in MultiBit HD beta 5 when it comes out.
In the current code there is support for:
+ create new Trezor wallet
+ transaction signing via the Trezor
+ verify Trezor (get the list of features)
+ wipe Trezor
+ sign message using Trezor
+ change PIN
Also:
+ create Trezor 'soft wallet' (= you lose your Trezor and create a software only wallet from the seed to recover your bitcoins).
+ recovery from local/ cloud backups.
You can see the overall progress of this iteration by looking at the github issues database we are using to track progress:
https://github.com/bitcoin-solutions/multibit-hd/issues?q=is%3Aopen+is%3Aissue+milestone%3A%22Private+beta+5+Trezor%22As we finish and test issues they go from 'open' to 'closed'.
Note that for technical reasons we will only be supporting 'account 0' so you won't see any transactions in any additional accounts you create in myTrezor.com.