Hi Dynamics AX Partners,
Along with the new Partner Network it's now easier to get certified in a particular industry solution. For each solution, you will still need to send at least one person to undergo the (usually week long) technical/pre-sales training, but the Sales Certifications and the Technical Certifications are now available to take online. They are currently available for Dynamics AX for Retail and the following industry solutions - Process Industries and Professional Services.
Training material for the certifications including e-courses are available on the Readiness pages. You only need one person to have passed the Sales Certification and the Technical certification to become certified (once the training course has been attended). Once you are certified, the certification should not expire.
If you have any questions, please contact me directly. Thanks!