Regional carriers are starting to announce availability for cellular models of Apple’s new Retina iPad mini just as the company today started offering the device to walk-in customers.

Bluegrass Cellular announced today that it is now offering the iPad mini Wi-Fi Cellular models in-store and online. Available on the carrier’s website now starting at the usual $530 for the 16GB model, the carrier is also offering all three models (16GB, 32GB, and 64GB) on its no-contract “Freedom, Expanded” plan. That allows customers to make 12 monthly payments to get the device they want with the ability to trade-in and upgrade to a new device after a year. That plan will run $26.50/month for the 16GB model on Bluegrass, $31.50/month for the $630 32GB model, or $36.50/month for the $730 64GB model. The carrier appears to only have Space Gray models of the device available, at least online, and the Freedom Expanded plans are only available in-store. Another regional carrier, C Spire Wireless, will begin selling the Retina iPad mini over the next week. Update: U.S. Cellular has also begun cellular iPad mini with Retina Display sales today on its website.

In other Retina iPad mini news, we’ve just received word Apple has just started selling the device to walk-in customers in its retail stores following an initial launch for Personal Pickup orders only.

The Personal Pickup option is still available online, while online orders of the Retina iPad mini are currently expected to ship in 5-10 days from Apple’s website. It’s unclear how much stock will available to walk-in customers across Apple’s retail stores, so your best bet might still be to order online for delivery or personal pickup.