1- It is an excel middleware, not a plug-in.
2- It works with either excel or other free source projects like google's one.
3-Spooz is not making use of the TT's gateway as you imply, Spooz does not need a gateway, it can be installed wherever you want, wherever you want and connect it to whatever you want (except your microwave). The partnership between TT and Spooz if for TT to provide an added value with a new software and Spooz to impact more players in the market ina shorter time.
get your facts straight.
The TT exchange gateway that Spooz is making use of to route to various exchanges is something that Spooz would have to pay TT for, not the other way around. Thus, I don't think it's accurate to say that "TT signed up with Spooz". My understanding of SpoozToolz is that it IS dependent on Excel to run, as it is an Excel plugin.