I fail to see why there are default mappings for normal mode:
exec 'nmap ' . g:sparkupExecuteMapping . ' :call Sparkup()'
exec 'imap ' . g:sparkupNextMapping . ' u:call SparkupNext()'
Please consider removing them.
I think that the normal mode mapping is useful for those who code the HTML tree structure first before turning them into actual HTML code. I don't do is, but there are probably some who do.
Do not add normal mode mappings for Vim.
It would really be apreciable if a one has the choice to enable/disable mapping in normal mode.