All the focus seems to be on play through Inferno by an assumed level 60 character with access to the GAH in a party... not exactly my playstyle. It's almost impossible to find discussion of progression through normal difficulty. Most advice is simply to rush it with equipment found in Nightmare or Hell difficulty. Level requirement for items lags about 10 levels behind your character. For a level 25 character, your best drops are going to have level requirements about level 15. So to the AH you go, or you can craft. Crafting seems to be a viable (if not expensive) twinking alternative to the AH for play through normal, up to about level 35.... perhaps higher. In terms of skill use, it's a mixed bag... way to player dependent for anything but general advice.
I think we are just waiting for that first mat/pat/guardian thread to get things rolling. Diablo wiki says there are titles in D3 too, they are just not implemented to be visible yet. And you get the mat/pat/guardian titles after beating hell, not inferno. The titles for beating inferno are Paragon and Demi-god for SC and HC respectively. The skill progression is mainly until you finish Hell anyways (or until you reach lvl60), afterwards it mainly becomes upgrading your gear, so any mat/pat/guardian thread for beating Hell could be as helpful for D3 as it was for D2.
I don't think I'll be posting a Mat/Pat thread here... but who knows? I've not even decided if I'm going to consider Inferno as reasonable by Solo-self found standards... much the same way most solo players politely ignored the Pandimonium Event and Ubers.
There are a couple of other issues as well as far as Mat/Pat threads. The biggest is that unlike D2 where all your skill points were locked in, with D3 you are able to experiment and so your character doesn't feel as defined as it was in D2. For a d2 sorc, you had to choose between three basic options (cold/fire/lightning) fairly quickly and so regardless of what skills you actually used, your character had immediate definition. With my wiz, I have used almost every skill and I frequently change and experiment. I'm still nowhere close to inferno and although I have a good build (I think) that will take me through NM and maybe through hell, I am sure I will have to switch it up (since this is now the third time I have been convinced that this is the right build.) In other words, once I get to inferno or beat inferno, if I had to write a guide to get someone from level 1 to endgame, I wouldn't know where to begin.
Secondly, as far as the SPF goes, most of the people around here are fairly finicky in terms of the RMAH and AH and so by going self-found, it'll be awhile I think before anyone beats inferno here. I'm determined to never buy anything on the AH or RMAH (although I might sell stuff on the RMAH at some point, because I put so many hours into this game it might as well be a second job and because I have always dreamed about getting paid to play video games) so that will mean that at certain points (Act 2 on all levels so far for me has been a big gear check) I will need to farm for days and I assume once I get to inferno weeks, to be able to progress.
That being said, once the guides do start rolling, I think people are going to find that the common notion that inferno is so hard that build diversity is impossible will go right out the window. I think there are probably going to be a couple of skills that will come in handy on all builds (War Cry for Barbs for example) but once people start to acquire the right gear, we will see tanking wizards, whirly barbs, trapping Demon Hunters and the like.