BlackBerry is a brandname for a PersonalDigitalAssistant that had a phenomenal growth in popularity, partly due to its good on-the-fly email and WirelessSecurity features. See http://en.wikipedia.org/wiki/BlackBerry
Some of the features of this unit require subscription to specialized BlackBerry services.
The device uses a proprietary operating system but there are JavaLanguage based models. Comments were made that this helped BlackBerrySecurityManagement features stand out amongst competitive WirelessDevices.
Fallen King of the SmartPhone
I looked at a mid05 glossay for a BlackBerry model 7100g. It claimed email attachments can be downloaded and viewed, including graphics, PDFs, word docs, etc. It also supporting viewing of HTML (and WAP) web pages. I am impressed.
Is it one of those AlmostTrue thing with hidden gotchas?
No, it actually works.
Any idea whether people use it to view PDF attachments much? Seems to me very difficult to use a "viewport" as a sole means to view a regular sized document. Unless there is a printer that will print these out back to normal size, and that means it is again in an office somewhere.