Google has recently launched a Web Version of their Android Market.

Browse Apps
Install to your phone
Read reviews and update logs
All the usual App details

One small problem: I don't seem to be able to log in. I get an "Invalid Request" page, so I can't Install apps from there :(Looks great, shame I can't use it.

https://market.android.com/

<<Problem with Market sign-ins (affecting some, not all) is known; team is on it.>>
Source: http://twitter.com/#!/AndroidDev/statuses/32880741960384512

Damn! this is scary as well
If you loose your gmail account, adversary can install apps on your phone remotely. Adversary can also see the list of apps installed.

The only good thing is its not allowing non-market app to install. Or even if it is installed on your phone, its not showing it here.

Otherwise its super cool
Tried installing 2 apps from market and works like charm