How to make an application to ignore updates? In my rooted LG Optimus One (a.k.a P500) running stock 2.3.3, I have few Google's applications preinstalled.

When updates are being checked, notification for presence of updates are included for these applications as well.  Since I am not using Wifi, I have to pay for every Kb and would like not have updates checked for certain applications alone. 

Please note: I do not want to block checking of updates totally, but only for few applications that I would like to choose (that could be either through Wifi or GSM).
Multiple approaches here.

First, you can open the PlayStore App, hit the menu button, go to settings, and advise it to only work with WLAN, plus not install apps automatically. This would cover part of your problem.

Second, you could also tell it to not check for updates at all. While on a first look this seems to contradict with your intention -- please read on. Go and install yourself the Appbrain App Market App. This actually utilizes the Google Play store, it is not a separate market. It even uses your Google account for everything. Now synchronize your installed apps with the AppBrain App. After that, you will see available updates -- and you can decide on a per-app basis whether to...


accept this update
skip this update only (and be reminded only for the next update)
skip updates for this app altogether


As you told the "original" PlayStore-App to "shut up", there won't be multiple update notifications. Just use the Appbrain App for updating your apps -- it will do so by calling the PlayStore app using its API. Batch-Updates ("Update all") are of course possible as well.