PMA is one of the big photography show of the year while the other is Photokina. Each year the announcement of new product attract lots of news people including blogger and many web site. You can sit and relax at home browsing these blogs and webs to find what’s happen in the show.
I recommend DPreview.com which is one of the most well known web for photo news. The coverage always extensive including review.
Canon just announced EOS 450D (Rebel XSi) 10MP, LiveView, Digic III and Spot Metering (finally)
Correction it is 12MP not 10MP. Larger view finder and using SD card in stead of CF.