Here is an article from AAIIMoney that evaluates in detail the SmartMoney.com, Morningstar.com and Wikinvest portfolio trackers. Its pretty good.
http://www.aaii.com/computerizedinvesting/article/the-top-online-portfolio-trackers
This Comparison article examines the top online portfolio tracking websites for individual investors. The focus here is on everyday investors and not on power traders or institutional investors, so top sites in this category should have a good balance of power and functionality, along with a reasonable price tag. In addition, expect these websites to be user-friendly. The three sites designated as the best in this year’s comparison are SmartMoney.com, Morningstar.com and Wikinvest.
FYI, that is from 2012 not this year. Wikinvest has been relaunched as SigFig which merely redisplays what is already in ones brokerage account vs being able to add/edit transactions. SmartMoney is now part of Marketwatch and also merely redisplays what is in ones brokerage account. Morningstar is probably the closest alternative to the old MSN Portfolio Manager where you can add/edit transactions although it does have a limit of 100/200 symbols in each free/paid portfolio.