I haven't read anything about Horne or Venters yet, but I do know David Bell is/was playing for the EA Sports Allstars. There are quite a few former Griz players playing over in Europe and other countries. I have looked up quite a few of them to find how they are doing. I've debated whether or not to post that on here, since I'm not sure how many people would be interested really. Anyway, here's what I've found about David Bell so far:
David Bell plays/played for the EA Sports Southwest All-Stars this year. There are currently 5 EA Sports All-Star teams out there (Southwest, Southeast, West, Midwest, East), with players from UCLA, Duke, UNLV, Mich St., and a few Big Sky teams on their rosters. Nate Green from Idaho State, and Shannon Taylor from EWU both play on EA Sports all-star teams. In their games they really don't have a set starting lineup that I noticed, since many times they play 3 games in 3 days and even when they do get a day off it looks like its spent travelling and then followed by 2 or 3 games in a row again. The Southwest All-Stars went 3-9 this year with wins over CSU-Northridge, New Mexico State and Oregon State. You can see the results, schedule and roster of all of the EA Sports All-Star teams at:
http://www.easports.com/events/easportsallstars2003/home.jsp
I was able to get Bell's stats for every game except the one against UC-Riverside. David Bell was averaging around 10.4 points per game, 1.8 assists, and 3 rebounds per game. His season high in scoring was in a win against New Mexico State where he scored 23 points, pulled down 8 rebounds and had 3 assists. A associated press article in the Albuquerque Tribune stated that New Mexico State was victim of "a long-range shooting clinic put on by David Bell" He hit five 3 pointers in that game. Bell also had a great game in a win over Oregon State. He played 29 minutes, scored 21 points, hit five 3 pointers, had 5 rebounds and a couple of steals.
Just to give you a idea of the type of players on the EA Sports All-Star teams, Ed O’Bannon who played for UCLA and I believe played in the NBA for a little while is on one of the teams. Hopefully ya all find this somewhat interesting

If you want I'll post what I can find about other former Grizzlies as I find it. I'll keep a eye out for where Horne, Venters, Mansell and this years seniors end up going if they end up playing BB somewhere.