Thanks to Thomas at the SWLing Post for this one. It seems Tecsun will shortly be releasing a new portable, the PL-680, which seems very similar in specs. to the PL-600. From the Nevada Radio (UK) website, these are the specs:

PL-680

This fully featured portable world band radio keeps you in with the action !

Covers from Long Wave to VHF Airband and has full HF coverage from 1711-29999kHz with BFO tuning on SSB signals.

Frequency ranges :

• FM:     87 – 108 MHz
• MW:    522-1620 kHz
• SW:    1711-29999 kHz
• LW:    100-519 kHz
• AIR:    118-137 MHz

Features :

• FM stereo / MW / LW / SW SSB / AIR band (118-137 MHz)
• Dual conversion for MW / LW / SW with excellent sensitivity & selectivity
• Synchronous detector (USB / LSB)
• SW Single Side Band (SSB) with BFO control
• 1900 station memories
• Multi-tuning methods:
• Auto tuning storage (ATS)
• Auto-scan tuning…