'til is the correct abbreviation of until and not a 'Common misspelling of "till", as in "until".'
Till is the common misspelling of until, but is in fact a cash register or a preparation of soil in readiness for planting.
Until is a future time reference.
Now I will have to wait 'til you get yourselves a dictionary to learn how to correctly spell!
T.I.L. (Today I Learned)
Often used as a space saver on websites such as Reddit or DIGG when writing the titles of links to interesting things the submitter has learned that day.