I saw a lot of QQ threads around the forums.Almost every single thread contained the "not enough applications" phrase.
First of all the Maemo 5 hasnt been around the market for a long time,not even as closely as the Android Platform or the Apple OS.Maemo is OPEN-SOURCE,i can bet that in a year,there will be much more applications for the n900 than for the other smartphones.
So stop comparing the n900 with the iSuck or the Android.The n900 has features that the iSuck or the Android can only dream of.Surely the n900 is missing some features,but hey,its a work in progress,there will be many firmware updates,the community will probably make a lot of tweaks,so things will get in place,just give it time.I see a lot of ppl are comparing the HD2 with the nokia n900,sure i dont mind it if u want a 110% a business phone go ahead and get Windows Mobile.

Things i do,and i love about my n900.
1.I can watch xVid and Divx video with almost no lag(i`ve noticed some minor lag,maybe in like 2% of a movie)
2.It supports flash,it bring a real-like web browser into my hands.
3.It has 48 GB`s of storage(yay)
4.There are awesome games that run on the n900,and there probably will be more
5.Even tho its purpose as a phone comes second,the phone call quiality is ****ing awesome as well as texting
6.It is highly customizable
7....i dont know...it does pretty much everything a PC can do?

Then again,YES there are some things that can be improved/missing.But then again-its open source and it runs linux(and linux is just awesome by itself)and those things will be added and improved.