Yeah, I just got this email too. It does look like it's going to affect the module. Fantastic.

• Integration of domestic and international price changes across all Web Tools APIs that use rates
• Merchandise Return API Insurance/Fee calculation updated for 2008 Price Change
• PriorityMail/StandardB API Service Standard data updated
• First Class Mail International API supports three shapes, machinability
• Deprecated GlobalLabelAirmail, GlobalLabelExpress APIs are no longer available
• IntlRate API supports three First Class Mail International product shapes now (new enumerations), addition of optional machinable attribute
• Signature Confirmation API reflects changed SC fee

Most impacted will be the integrators using RateV2 and IntlRate as shown below.

RateV2: Besides the price differences, there are new services and a renamed service. This also changes the order of the services within the response. Note that RateV2 is in maintenance-only mode and integrators should upgrade to RateV3 to obtain the latest features.

IntlRate: Besides the price differences, the former First Class Mail International (FCMI) with Service ID=”3” is replaced with up to three nodes: FCMI Letter ID=”13”, FCMI Flat ID=”14”, and FCMI Parcel ID=”15”. In addition, currency values are returned in a two-decimal-place fixed format (was inconsistent before).

Additionally, there are a few subtle differences in First Class Mail International nodes returned for IntlRate:

• Hyphen in name. Was “First-Class” but now will be “First Class” as shown.
• MaxWeight in pounds. Previously, all nodes returned in pounds except for First Class Mail which was in ounces. Now, they are all in pounds including FCMI.
• We already mentioned that the The currency values will be formatted to two decimal places.
• There are various changes to the text within and as appropriate for the new shapes.