You could update your phones to 7.8 by using the Seven-Eighter utility found on WPCentral. I used the CAB installer referenced in the article on my HTC Arrive going back to the Tango update with no issues at all. Keep in mind doing either method may brick your phone, and you do this at your own risk. At the very least, you'll have an excuse to get anther phone.
For those interested, Windows Phone Hacker has updated the Seven-Eighter utility to the latest WP7.8 build. Depending on your build this updating your 1st/2nd generation Windows Phone could only be minutes away.
Finally found the time to force my Titan to the latest Windows Phone 7.8 build (8862). Enjoying the improved Start Screen, but still need to get around to flashing a custom ROM, so I can re-enable the features that AT&T disabled.
Pervy Sage woke up this morning, and there was a text saying "You have a phone update" or something.
Plugged phone into Zune >> settings >> update phone
Just followed instructions and got WinPhone 7.8
No hax, no trojans, no warez, no pull the phone out at the last second tricks, no cabs.
Only problem was had to manually restart phone when it had a BITS error or something like that, and do the Zune >> settings >> update phone again, but really, simple easy upgrade. There was like 5 updates in a row.
Not much difference, the tiles are resizable on the home screen and guess there's back end stuff, but nothing really noticable between 7.8 or 7.5.
- typing seems noticeably faster... might be my imagination, but seems like there's less lag (as if there was before)
*note, pic found on bing, Pervy Sage doesn't use a samsung