Well, all the pages read "Version: 2.0 | 07.10.2009 | N900/RX-51 | Board version: 2JH_21a " It's quite possible the board rev of MP devices is a little different, though 2009-10-07 (if that's the correct way to read this) on schematics makes me think it isn't completely different from what shipped 6 weeks later.
All the issues arising from OTG protocol complexity are neglegtable for a simple manually enabled host mode. jOERG