Blazer 4.0 is part of the included software on the T5 and looks like a very nice upgrade to the Blazer browser on the current Treo. Aside from device specific enhancements, like wide-screen viewing for the T5, the new Blazer handles web standards (HTML 4.01, xHTML 1.0, cHTML, WML 1.3, SSL 3.0, HTTP 1.1, JavaScript 1.5, CSS 1.0 and 2.0 (partial), GIF, animated GIF, JPEG, PNG, BMP and Cookies), offline browsing, save to card (both internal and card) and SSL.
This will be a most welcome addition on the Treo 650 assuming PalmOne decides to include it.
does it let you upload photos to a web site?
I have not tried… but you can use an FTP client, or send via MMS or even a Palm Blog client if that is what you are trying to do.