We've also observed that an increasing number of search committees are asking applicants to submit recommendations to a web site (often managed by the HR Dept). I'm writing to let you know that Interfolio can now accommodate web upload requests of specific letters.
This is a new capability and we're trying to get the word out as quickly as possible since we're right in the middle of the application season. There has been a fair amount of frustration this year with the new HR systems and online applications, and both applicants and search committees have reported being overburdened and confused about the right way to submit letters to the web site. The new Interfolio feature streamlines their process significantly, and costs applicants about the same as a regular delivery (starting at $4).
I don't vouch for interfolio, and I don't know how well this will work. Also, it seems pretty pricey. But whatever. I thought I'd pass the message along.