[harnhua]

I'm in a similar situation, and am struggling with the same question. From some desktop research and talking to investors/other startups, it seems like "0.1% - 2% of post-Series A stock" is a reasonable range depending on the results an advisor might bring about. (http://venturehacks.com/articles/advisors-part-2)

Are you planning to draft a legal agreement of sorts with this person? If yes, it may be helpful to tie in dollar amounts with milestones to determine equity percentages, I think. Personally I find it hard to quantify how much connections and a couple of hours a week are worth in terms of dollars. If it's possible to put a revenue amount to what s/he is bringing to the table, either in a strategic "$X in the first N years" or "$X from this release within N years" kind of way, that may help to crystallize the equity percentage somewhat.