I figured it out!

Here is a one-click URL to give you today's trendline number using WolframAlpha:
 
https://www.wolframalpha.com/input/?i=10+%5E+%28+%28+3073%2F1000000+%29+*+%28+number+of+days+since+jan+3%2C+2009%2F+days+%29+-+2.909514+%29


*edit: fixed URL