Yes, the "buy now or wait" threads seem to be multiplying exponentially as the start of the school years approaches and the update season draws closer. It is your choice, but either way, you will be getting a superb machine. I'm a recent switcher and I'm hugely enjoying the MBP. It's aesthetically attractive, powerful, has great performance, and a superb screen. So, unless you one of the people who simply must have the latest model and spec, I'd say get the current model. If not now, wait until the updates are out, and get the current model as by then quite generous discounts will probably be given on it.
Having said that, it seems that received opinion is of the view that major changes in design and spec might be on the cards; two weeks ago, even last week, received opinion was that any changes would be tweaking, speed bumps, cosmetic, stuff like that. Do bear in mind that the name of the forum is Mac Rumors, not Mac Fact. Yes, some of the rumours are so well sourced they come uncomfortably (or comfortably) close to fact. Your choice. However, the MBP is a great machine and whichever one you buy, you will love. Cheers and good luck.

MBP 15.4", 2.4 ghz, 2 GB RAM, 160 HDD; iPod classic 30 GB