Well here's a pleasant surprise I came across while browsing the CrackBerry Forums this morning... it seems the good folks at Fixmo have gone into public beta on a desktop client for BlackBerry Messenger! That's right, we're talking about using BlackBerry Messenger from your computer.
Note, this isn't a standalone client - you still need a BlackBerry Smartphone with BlackBerry Messenger on it to use Fixmo Web Messenger from your computer. You can almost think of it like BlackBerry Bridge from your PlayBook to Smartphone, but this is from your BlackBerry Smartphone to your computer. Jump on over to the forum thread at the link below for more details and keep it locked to CrackBerry for more info on this as it evolves through the beta process. Cool stuff!