I just went and voted the maximum 25 times for Neifi! to be on the NL All-Star team.
In fact, I didn't bother with most of the ballot -- just voted for Derrek Lee, Aramis Ramirez and Neifi!
You'll have to write Neifi!'s name in, and make sure you spell it right; the write-in slot is at the bottom of the ballot.
The website does conveniently save whatever you put in the first time you vote, so you'll only have to type the name once. Be careful -- you'll have to uncheck the "I want commercial e-mail" box every time, though.
Vote here. You can vote for Neifi! 25 times a day.
As we say in Chicago, vote early and often.