20. The method of claim 11 wherein, for each of one or more of the at least one task performers, the identifying of the one or more tasks for the task performer is further based at least in part on information about other task performers that are similar to the task performer, the information reflecting prior activities of the other task performers and/or attributes of the other task performers.
11. A computer-implemented method for facilitating performance by task performers of tasks from task requesters, the method comprising: receiving indications of multiple available tasks supplied by task requesters, each of the tasks being available for performance by one or more task performers; and for each of at least one of multiple task performers who are available to perform tasks, obtaining information about prior activities of the task performer that include performing one or more tasks supplied by one or more task requesters; automatically determining one or more attributes of tasks that are appropriate for the task performer based at least in part on the prior activities of the task performer, and identifying one or more of the multiple available tasks for the task performer based at least in part on the identified tasks each having at least one of the determined attributes, the automatic determining being performed by one or more configured computer processors and including weighting at least some of the obtained information about the prior activities of the task performer based on recency of the prior activities, such that a first prior activity of the task performer has a greater impact on the determining than does a second prior activity of the task performer if the first prior activity occurred more recently than the second prior activity; and providing one or more indications of the identified tasks to the task performer as recommendations.