Here is what they say:
We really need help from you all to make Ecma Office Open XML a standard and we need support from Australia. Would you be able to sign up to the community so that we have the support to get this through. All you need is list a company name, URL and one contact.
2. Send a letter of support to be addressed to the local standards body. A suggested template for that letter of support is attached.
That might be useless without technical comments on the standard, at least that's what the CNI is saying according to Pavel Janik:
The good atmosphere was destroyed by Petr Wallenfels (not his fault though) from ČNI who has shown us several (approx. 30) letters from Microsoft partners and customers. They have all almost the same contents "We would like ČNI to accept this proposal, because …". There was no negative letter. Fortunately this is not how ČNI works. The complete process was transparent and only technical comments were allowed. Looks like all writers were victims of some business politics around OOXML. This was the only sad point in the meeting. It was poor from the person/company who organized this.