Why do you think the Asus won't have good aftermarket developer support? It's a decent device with a good price, and it' s not locked down or anything. The lack of development going on for the Transformer, I would guess, is probably because it's been so hard to get them. The 16GB is still hit or miss in terms of stock supply, it's not like when a carrier releases a big phone and over the course of a weekend tens of thousands of devices are in hands of customers.
Plus my experience with Asus has been they are great with software updates, not just compared to Samsung's poor reputation in that regard but in general. I used to have one of their netbooks and they provided full Windows 7 drivers a full year later so we could upgrade from XP - it was totally unexpected and it actually made the device so much faster and nicer to use than it was brand new with XP.
I guess I've become a bit of an Asus fanboy without noticing, spent over $1,300 on Asus products in the last two or so months. But I genuinely think they do nice products, and their customer support is much better than one would expect.
You may very well have a faulty unit with the touchscreen, I think I read about that on XDA. But it's so hard to know what on XDA is real and what isn't these days, too many idiots with a poor grasp of English complaining about unimportant crap.
Thread after thread about the Transformer's poor build quality, about how it creaks... well my $250 Nook color creaked, my $1300 MacBook Pro unibody creaked. I really do think some of those guys are being especially hard on Asus because it's a relatively unknown Asian company with a funny sounding name.
Anyway, I guess we'll have to wait for some reputable people to review the Tab 10.1... I do find the Transformer a bit too heavy to hold, but like I said, I wasn't prepared to shell out more monies for Honeycomb at this point so I'm happy.