I'm also dying to demo these. As far as I know the 735s are a forged combo stainless steel set. From viewing pictures and talking to Titleist demo reps they have what looks like a bore through shaft but it's not "really". The rep said, "it's not like Callaway's bore through stuff, it's to move more weight around." He also stated they compare closest to the 690CBs. Some reps also say there will be a chrome version coming out also. Another site posted a small review today saying, "They are the single best irons Titleist has ever made." Sounds like a strong statement, but we'll have to see for ourselves.
The best pics that I've found are from a foreign site,
www.birdie2.com
. I believe there is a search box on the left. Type in titleist 735 and then click the button. Again it's a foreign site so it maybe hard to follow the language.
The release date seems to be the trickiest part. One day a Titleist rep will say June, then the next day say somewhere between July to September, then the following next day say June again. I dont think they know. But Titleist is missing the boat on releasing these sooner than later.