Ok this is only my opinion so here it goes
Forget about the whole red/blue laser cause that is YEARS off!!! HDDVD's won't be consumer for years!! (blue wavelength lazers will support up to 25 gigs and up for future HDDVD recording etc.)
As far as waiting, if you have the cash buy the Sony now. I haven't heard or read about a new standard coming down the pipeline so being that it can handle + and - formats you should be set. (if someone has heard differnet please let me know
)
The only thing that will happen before HDDVD's is that the units will be able to record faster. Prices will drop a bit but not likely to get near the $100 mark in the next two years. So it really boils down to if you want to use the format.
I personally own a Pioneer A03 which I love. It is slow but I am saving data/making movies much easier than with cdr/rw's. I have my whole MP3 collection on 5 dvd's as opposed to 30+ cds
I am going to get a Sony so that I can have both formats in one unit and don't foresee (sp?) the prices of dual format dvd burners coming down below $250 in the next year so it is more than worth it to me to use it now and enjoy it
If you are just getting the drive to save some data forget it. Just use CD's. You would be better of waiting IMO.
Again, I might be wrong with some of the info and will be glad to edit it if told/shown different
Just letting you know what I have read about.
Good Luck