Guys... had been using Tattoo for sometimes and it comes with Market. However, if i find that whenever i access market from my tattoo. The apps list like wasn't updated.... anything i had missed out??? For example i tried to search WAZE in market but not to avail... wat a surprise to me.... Anyone had this experience????

Your HTC Tattoo most probably is a SEA set and probably comes with SlideME instead of the regular Android Marketplace. To get the Android Marketplace you will have to root your device.

Ermm.. sorry..
Not only root but flash with other custom ROM..
Example MoDaCo ROM..
I'm using the ROM right now.. And the list of Apps and Games are always updated everyday!!
How to Root your Android
Lists of Custom ROM!

Normally when people mean "root" they mean installing a custom ROM, but true. Rooting gives you superuser access so you can flash a custom ROM.

IC.... if tat's the case... i think i would rather wait for eclair n do everything in one shot... afterall it still serve me well... is just a bit dissapointed not able to use offline navigation software only....

There's a custom ROM Eclair for HTC Tattoo from XDA Developer..
But, camera is malfunction, messy live wallpaper and laggy everywhere because of unofficial stuff.
I tried it before but switch back to MoDaCo ROM..
Half a year already waiting for 2.1 update and now, Nexus One already with Froyo..
No luck for HTC Tattoo users which's including me...

any pro and cons for android OS?

First of all I don't think that the Pros and Cons for Android OS has anything to do with the Android Marketplace.

But I'm going to list them anyway.

Pros:
Open-Source
Android Marketplace (50,000+ apps)
Simple interface for daily basic tasks

Cons:
Rubbish battery life
Somewhat complex interface for more advanced tasks

Yup saw that... tat's wat i'm worried about and totally agree with u that we left out as and tattoo user...
i'm still confused... how to differentiate slideME and Android Market.... somewat my icon is and same as Android Market icon in my tattoo....
And wat confused me further was i saw a running service named market updater... wat doesn't these means...

SlideME's icon is a picture of the alphabet "S" while the Market's icon is of a picture of a Bag

means mine are android market... wasn't slideME

I only know market enabler but never use market updater before.
I'll try it later.. But, I think maybe market updater is to check latest installed apps and games available..
And then straightaway can be updated there.. I think so..