Well, it's been quite some time since the release of the HD4550, but even though there's been passive cards announced, I've yet to see anything hit the streets. An interesting thing though, Sapphire changed their actively cooled HD4550 to passive as can been seen on their HD4550 product page. Unfortunately, I haven't been able to find any vendors locally or online that actually specify the passive version of the Sapphire card. Interestingly enough, there is a Ebay seller that is selling a Sapphire fanless heatsink HD4550. A concern I have however, is that the HD4550 may not do SD deinterlacing quite as well as the HD4650/4670 as can seen from this post on AVSForum.
On another note, I'm a big fan of Mediaportal, but I'm thinking of doing a Mediaportal vs XBMC comparison when I get the chance. Need to find some time to set it up though.
