You could run this ROM, which is based on the latest OTA release from HTC, so no OTA updates are needed. It is optimized, deodexed, and tweaked just a tad. I use it as my daily driver with great success. http://rootzwiki.com/topic/12063-dev...odexed-crtgpu/
Additionally, here's the latest from T-Mobile:
Beginning January 9, the T-Mobile myTouch 4G Slide update to version 1.55.531.3 has been paused. HTC has stated they paused the update to improve performance on the new software version.
You cannot download the update manually nor receive it as an OTA. There is not yet a date that the update will resume.
We will update this page immediately when more information is available.