Escrow via multisig

[5flags]

I know this is a hot topic right now, but I'm thinking about multisig transactions and wondering what the best strategy is. I've seen the following pseudocode from Gavin:

https://gist.github.com/gavinandresen/3966071

I notice that it relies on the txid to work - so my questions is this: is this implementation of multisig vulnerable to the txid mutability issues?

5flags

[maxxoccupancy]

I'M ALSO SPENDING A LOT OF TIME ON MULTI-SIG AND ESCROW ISSUES.  MY CONCERN IS WHETHER OR NOT THE PROCESS IS GOING TO BE EASY, INTUITIVE, OR FREE ("as in beer").

[jcrubino]

It is not if you use only inputs with one or more transactions.