The first lot of 10 boards are getting built at the moment and will go to preorders then first come first served. Then they'll be another larger order of pcbs made which will be a few months before more will be available.
In a word no there's loads of ways to load a game including sd card or usb stick, iPhone etc.
The board has the original tape in jack which you can use an iPhone, usb tape player or other digital device. .tap files and also the enhanced quick load files are readily available. I had a tape player with usb port at the play expo demo. You can also use the divmmc products via the external expansion slot like any other spectrum which have sd card on them and i included an ide connector option for using compact flash card ide adapters. This last option though is dev only at the mo though as to access this requires better improved roms. (128k roms don't have the enhanced os yet like +3 roms do)
The board is a reduced chip count recreation using plate through only so space is limited. Cost is another factor along with complexity of design. Adding stereo sound, scart, vga, kempston joystick port in the space has been a challenge so some things needed to remain external plug ons.