Dynamic default value (now) possible?
I'm afraid it is not possible with either of them. The default value is handed down to the input type in the same parameter as the current value, there is no possibility to distinguish between them so I can't decide when to parse and when not. The solution lies with SF here. You might vote on this or this bug or (more effectively) discuss it with Yaron directly.
It's not clear to me that this requires any change from SF - it might just need a fix in SFI. F.trott and I talked about the issue "offline", but now I don't remember what the conclusion was.
I do. :)
The point is, SFI could parse the current/default value given as a parameter to the input. But then it would also parse any user input a user might have done earlier. E.g. lets say it would indeed parse the value. Along comes some user thinking that "{{#time:...}}" would be a good thing to put into that field - would result in a valid date after all. This user would fully and rightly expect that "{{#time:...}}" appears verbatim in the page. It even would after the first edit. Then on the second edit the datepicker would parse that string and save it, i.e. it would replace the parser command by a static value.
