First post, so hello to all! I've been rooting through AAS while I decided whether to get an S60 phone and it's been a lot of help. Hence today I picked up a 5530XM and so far I'm pretty impressed (for GBP100 you can't fall off). Anyway, perhaps my slight gripe is the lack of support for the phone - OK, so it's largely the same as a 5800, but there are differences. Hence iPlayer not working properly.
After a day going through here and a number of other forums, cobbling together bits of half-information and some serious trial and error, I've finally managed to encode video to work on the 5530 having found Hardballer's write up for the 5800 on HowardForums - http://www.howardforums.com/showpost.php?p=12157279&postcount=1.
Now, this worked for me on 5530XM and the quality's really very good. I hope it's of some use to someone else over here.