In the meantime, there are DVD-5s of the PAL version, the NTSC version, the NTSC Purist version, an Xvid version, and a couple of earlier PAL and NTSC versions that weren't not quite up to snuff. ;) These are all readily available via alt.binaries.starwars, fanedit.org, and various torrent sites (except for the Purist version for some reason). I even saw a 700 mb Xvid on Demonoid the other day.
Any of these releases are great to enjoy the film as is, but the DVD-9 will certainly have some other special features and a higher bit rate, lending to an improved picture. That being said, I can't imagine the video being much better than the existing single-layer releases. I don't have many DVDs that look much better than what Ady has already put out there.
This has been a project over two years in the making and has been plagued by delays and setbacks. Trying to lock down a specific release will only lead disappointment if the dual-layer release is delayed from that date as well. I'm looking forward to this as much as the next person, but what's out there now is great for the time being.
Now that I've said all this, I fully expect Ady to start uploading the PAL DVD-9 in the next 30 minutes! :)