Jolsa .. where did you get the £20 deal on your 5800?
O2 Retentions. Actually it may not have been retentions – phoned up customer services a few months back as I was out of contract. Offered a free 5800 with god knows how many minutes and texts for £20, asked politely for unlimited data to seal the deal and got it.
Tip – when checking your phone to see if there's a newer software version update, do it through the program on the pc rather than checking over the air using the *#0000# method – might just be me, but I was getting nothing when doing *#0000#, but through Nokia Software Updater it found an update.
Skyfire browser sounds quite good, better than Opera Mobile according to these guys.