Hmmm...some proof that Inuyasha will NOT end wtih 150 episodes.
Ep.141
The Released Monstrous Horse, Entei
Tokihanatareta Youba Entei
Ep.142
Runaway Entei and Bloodcurdling Hakudoushi
Bousou Entei to Senritsu no Hakudoushi
Ep.143
3000 Leagues in Search of Father
Chichi wo Tazunete Sanzen-ri
Ep.144
Housenki and The Final Shard
Housenki to Saigo no Kakerai
Ep.145
The Bizarre Gate Keepers at The Boundary between This and The Next Worlds
Anoyo to no Sakai ni Iyouna Momban
Ep.146
The Rough Mistress of Birds, Princess Abi
Kishouarai Toritsukai Abi-Hime
Ep.147
A Fateful Love Song Before We Met (1)
Meguriau Mae no Ummei Renka (1)
Ep.148
A Fateful Love Song Before We Met (2)
Meguriau Mae no Ummei Renka (2)
Source:
http://inuyasha-info.virtue.nu/
Episode 147-148 are filler episodes (called the 'Spring Speical' as oppose to the 'Winter Speical' about some woman in love with Sesshomaru. Don't know the episode numbers) So if those two are fillers, then the series must contuine!

Although, this is gonna tottally drain my purse since I want to obtain the whole series. Only three episodes pure DVD and over 100 episodes? Ugh...