So, the aforementioned BlackBerry Internet Service upgrade went through this weekend, but word has it that the matching version 4.5 handheld software won’t be available until September. The biggest kick in the teeth here is the lack of HTML email viewing, but those who have smuggled the early betas of the OS onto their BlackBerry will be able to enjoy the feature on BIS. OS 4.5 will bring some other goodies to the table, like native file downloading in a variety of formats (including audio and video) up to 3 MB and document editing. Integration with AOL and Windows Live won’t require the new OS, and is being offered right now with BIS 2.5. For further features of the new BlackBerry Internet Service, check out this knowledgebase article.