Wiki Leaker Locked Up

There have been a few comments about the bail decision in the case of Julian Assange, the WikiLeaks figurehead. From the information available in the press, I don't think that I would have bailed him either.
Are there substantial grounds to fear that if granted bail he would abscond, commit further offences, or interfere with witnesses? We are dealing with the Swedish warrant alleging a sexual offence. He is clearly an international citizen without a job home or family in the UK. I have no idea how the Swedes deal with these matters, but on any analysis a conviction is likely to lead to a prison sentence, albeit in the relatively humane Swedish system. That must be an incentive to abscond. What conditions could address this fear? Sureties or securities from very rich people wh do not even know him don't mean a lot. If Ms. Jemima Khan (Née Goldsmith) were to lose £20,000, that would very likely be less than she spends on her hairdresser in a year. It might be a price worth paying to get her protégé on his way. So inside he must go, I'm afraid.

And this is the Swedish warrant. If America's rage and frustration turns to a determination to make an example of Assange, then he could be looking at 20 years or more in the barbarous hellhole of a Supermax jail. If that isn't an incentive to do a runner, I don't know what is.