e-Detailing Portals: Do they really work?

e-Detailing has been a buzz in the pharmaceutical industry since early 2000's as an innovative way to promote / communicate the marketing messages to the physicians. I agree on the advantages if electronic media is utilized for detailing the products using a Tablet PC, laptop or a PDA (with fairly good screen size) by a sales representative. This will help the reps to use visual technology like animation to explain complex medical things more emphatically and interestingly, e-signatures to record physican's feedbacks and queries, collect market / customer information on real-time etc.. But if portals are used for e-Detailing, then I have my questions -

1. What propels the physician to visit these sites? I have read about financial incentives for visiting the sites. Then how do the companies ensure that the physician reads/ goes through the messages in these sites?
2. How ready and open are the physicians to enter the details and follow-up requests in these sites?
3. How do pharma companies ensure that the e-Detailing portal is not just an "advertising portal" of the company towards the physicians?
4. Is it realistic to imagine that every physician will remember about 5 (if not more) log-ins and passwords for every company's e-Detailing portal? How do companies manage this?

As I have written above, I totally agree with having e-Detailing built-in on the sales reps' laptop or Tablet PC, so that an effective transfer of information (targeted to the specific customer needs) can happen on a visit. But my above questions are about the band of e-Detailing portals that have come up recently.

It would be great, if I can recieve your thoughts on this.

Cheers.