The current manufacturing run of Maples and Maple Minis is done and en route to us. If you're impatient, you can already buy them from Seeed Studio: Maple and Maple Mini. Regarding distribution, we are (hopefully) no longer going to be selling boards directly from our site any more, and instead will be relying solely on distributors. We'll keep you guys updated regarding which boards are available where, as that occurs over the next couple of weeks.
Point of interest: these boards should be functionally identical to the previous revisions, but with a couple of minor changes and additions to the silkscreens. Most notably, the silkscreens now indicate a max input voltage of 5V. The power circuitry is unchanged, but there was continual confusion over how much current could safely be pulled at varying voltage inputs, so now the party line is 5V max. If you were safely running off a higher voltage previously, it should still work fine. More information about power regulation on Maple and Maple Mini can be found here. In addition, we pulled off a diode on Maple Mini so the USB 5V line is accessible from the VIN pin. Refer to the schematic for details.
Last but not least, Maple II and Maple Native II designs have been sent out for prototyping! So we should have the first release candidates in our hands within a week or two. We'll keep you updated.