to me, the only real "drawbacks" i see with the R-09, thus far, are as follows:
1) no support for 4 GB (yet... though i'm sure they will come through with it)
2) because of the above, there's surely no auto-split feature yet (but perhaps it will be included with 4 GB support, via firmware update)
3) no digital input
as mentioned, i really think they will update the R-09 with some firmware so that 4 GB cards will be taken. even if they do not include an auto split, if the R-09 is as quick as the R-1 for stopping/starting a new file, it's only a couple of seconds of crowd noise lost. again, not a big deal to me. and for the third item, for those who don't run an ADC in front of the recorder, again not a big deal.
yes, it is a shame there's no digital input, but if the quality of the internal ADC is that of the R-1, i'll be quite satisfied.