No, the TOS prohibits Adsense on "software appications".
I know the line is difficoult to draw sometimes, but for example:
Forums are OK
Webmail pages aro NOT ok
Generally speaking, a user comes to your forum because of the contents you have there, and to your webmail because of the (software) service they are finding there.....
[edited by: martinibuster at 6:52 am (utc) on Sep. 2, 2006]
[edit reason] Fixed formatting. [/edit] [/edit][/1]